Marshal of the Royal Air Force Viscount Portal of Hungerford KG GCB OM DSO* MC, Chief of the Air Staff during WWII 1978 cover signed by Leutnant Wilhelm Crinius Knights Cross with Oakleaves,  Major Kurt Dahlmann Knights Cross with Oakleaves and Major Erich Rudorffer Knights Cross with Oakleaves and Swords


Official RAF Museum Historic Aviator commemorative cover

 HA25 RAF Museum Historic Aviator cover commemorating MRAF Viscount Portal who served during WWI as a despatch motorcyle rider and joined the RFC in 1915 as an observer and then pilot amassing 1,000 flying hours. He was recognised as a outstanding leader during the inter war years and in 1940 was in Command of Bomber Command and then promoted to Chief of the Air Staff for five years.
The cover shows DeHavilland Mosquito and Avro lancaster aircraft in the distance flying over Buckingham Palace for the Victory Parade in 1945 and inset picture of Portal, the cover has been flown in a Jaguar GR1 of No 54 Squadron and then reflown in a Jetstream. Cover bears  Isle of Man stamp cancelled with 50th Anniversary of No 3 Flying Training Squadron 22 April 1978.

Cover is signed by 
Major Erich Rudorffer Knights Cross with Oakleaves and Swords
Erich Rudorffer (1 November 1917 – 8 April 2016) was a German Luftwaffe fighter ace who was one of a handful who served with the Luftwaffe through the whole of World War II. He was the 7th most successful fighter pilot in the history of air warfare, with 222 victories claimed. Rudorffer fought in all the major German theaters of war, including the European and Mediterranean Theater of Operations and the Eastern Front. During the war he flew more than 1000 combat missions, engaging in aerial combat over 300 times. Rudorffer was shot down by flak and enemy fighters 16 times and had to take to his parachute nine times.
Rudorffer claimed his first kill, a Curtiss Hawk 75, on 14 May 1940. He scored eight more times before the capitulation of France. He flew throughout the Battle of Britain, and it is claimed he was pursued down Croydon High Street below rooftop level by a Hurricane. He achieved his nineteenth victory on 1 May 1941; he was then awarded the Knight's Cross of the Iron Cross (Ritterkreuz of the Iron Cross). On 19 May 1941, Rudorffer and his wingman attacked a diving submarine off the Isle of Portland. It was observed that both bombs struck close and that the submarine went down vertically.

On 18 June 1941, II. Gruppe moved from Beaumont-le-Roger to Abbeville-Drucat where it stayed for the next six months. From this point on, the Gruppe defended against the RAF Fighter Command "non-stop offensive" over France. In July 1941, while flying with the Stab (headquarters unit) of JG 2, Rudorffer claimed six aerial victories. This figure includes two Spitfires on 7 July, a Spitfire and a Hurricane on 9 July, one Spitfire on 10 and 11 July each. He then served with 6. Staffel of JG 2 and claimed fifteen further aerial victories by the end of 1941, taking his total to 41. Rudorffer was appointed Staffelkapitän (squadron leader) of 6. Staffel of JG 2 on 1 November 1941, thus succeeding Oberleutnant Frank Liesendahl who was transferred. In March 1942, II. Gruppe began converting to the Focke-Wulf Fw 190 A-2. Conversion training was done in a round-robin system, Staffel by Staffel, at the Le Bourget Airfield near Paris. The conversion completed by end-April. From then on, the Gruppe was equipped with the Fw 190 A-2 and A-3 variant. In 1942, Rudorffer participated in Operation Cerberus (Channel Dash) and flew over the Allied landings at Dieppe in August 1942.

In early November 1942, the Western Allies launched Operation Torch, the Anglo–American invasion of French North Africa. On 17 November, II. Gruppe of JG 2 was withdrawn from the English Channel Front and ordered to San Pietro Clarenza, Sicily. At the time, the Gruppe was equipped with the Fw 190 A-3, some Fw 190 A-2s, and received the A-4 variant in early December. This made II. Gruppe of JG 2 the only Fw 190 equipped fighter unit in the Mediterranean Theater. The Gruppe flew its first missions on 19 November, securing German air and sea transportation to Tunis. That day, elements of II. Gruppe began relocating to Bizerte Airfield. On 9 February 1943 Rudorffer claimed to have defeated 8 British pilots during a 32-minute aerial battle, and for the first time became an "ace-in-a-day". Again on 15 February he claimed 7 kills. Among his claims during the North Africa were 10 Allied bombers.
On 17 April 1943, Rudorffer was appointed Gruppenkommandeur (group commander) of II. Gruppe of JG 2. He replaced Hauptmann Adolf Dickfeld in this capacity who had been transferred to II. Gruppe of Jagdgeschwader 11 (JG 11—11th Fighter Wing). A little over two months later, on 30 June, he was transferred again, taking command of IV. Gruppe of Jagdgeschwader 54 (JG 54—54th Fighter Wing) on the Eastern Front. Command of II. Gruppe of JG 2 was handed over to Hauptmann Kurt Bühligen. He claimed his first victory in that theater on 7 August. Due to the experience gained in combat with the RAF he achieved considerable success. During his first sortie on 24 August 1943, 5 Soviet aircraft were downed in 4 minutes.

On 11 October 1943, Rudorffer was also credited with his 100th aerial victory. He was the 55th Luftwaffe pilot to achieve the century mark. In aerial combat near Teremky and Glychow, he claimed a Yak-7, his 100th victory, at 12:22, a LaGG-3 at 12:22, and three more Yak-7 shot down at 12:24, 12:25 and 12:27 respectively. On 6 November 1943, Rudorffer was credited with 13 aerial victories, eight Yak-7s and five Yak-9s in the timeframe 13:00 to 13:17, taking his total to 122 aerial victories.
JG 7 "Nowotny" was the first operational jet fighter wing in the world and was named after Walter Nowotny, who was killed in action on 8 November 1944. Nowotny, a fighter pilot credited with 258 aerial victories and recipient of the Knight's Cross of the Iron Cross with Oak Leaves, Swords and Diamonds (Ritterkreuz des Eisernen Kreuzes mit Eichenlaub, Schwertern und Brillanten), had been assessing the Messerschmitt Me 262 jet aircraft under operational conditions. JG 7 "Nowotny" was equipped with the Me 262, an aircraft which was heavily armed and faster than any Allied fighter. General der Jagdflieger (General of the Fighter Force) Adolf Galland hoped that the Me 262 would compensate for the Allies' numerical superiority. On 12 November 1944, the Oberkommando der Luftwaffe (OKL—Air Force High Command) ordered JG 7 "Nowotny" to be equipped with the Me 262. Galland appointed Oberst Johannes Steinhoff as its first Geschwaderkommodore (wing commander).

In the winter of 1944 Rudorffer was trained on the Me 262 jet fighter. In February 1945, he was recalled to command I. Gruppe JG 7 "Nowotny" from Major Theodor Weissenberger who replaced Steinhoff as Geschwaderkommodore. Rudorffer claimed 12 victories with the Me 262, to bring his total to 222. His tally included 136 on the Eastern Front, 26 in North Africa and 60 on the Western Front including 10 heavy bombers.

Major Kurt Dahlmann Knights Cross with Oak Leaves
Dahlmann was born in Königsberg (today Kaliningrad). In 1925 Dahlmann and his family moved to Danzig, where he was educated. Upon completing his Abitur in 1936 he took up flight training at the Fliegerübungsstelle (flight training center) at Marienburg in Elbing. He began his flying career smuggling rationed gasoline from Germany to Poland in a light two seat aircraft, the second seat being used to hold a 60-litre (13 imp gal; 16 US gal) gasoline canister. Following obligatory service in the Reichsarbeitsdienst he was inducted into the Luftwaffe in November 1937 and furthered his flight training at Luftkriegsschule 3 (LKS 3—3rd air war school), Wildpark-West near Werder. In 1939 shortly before the start of the Second World War he received his commission as a Luftwaffe Lieutenant.
Dahlmann was further trained as a bomber and ground attack pilot, flying both Junkers Ju 88 and Fw 190 in that role. He participated in the Polish Campaign, the Battle of Britain, and the campaign against France as well as the North African Campaign under Rommel at the controls of a Junkers Ju 88. He was never shot down although, according to him, he did have to leave his aircraft involuntarily on various occasions.
Dahlmann later specialized in solo night bombing attacks against specific high-value targets. These missions included weapons factories in Britain, British airfields, late war harassing bombing raids over London and attacking the Remagen bridge which was the first Allied open crossing over the Rhine river into Germany. He was also personally assigned a specially stripped-down, high-speed Fw 190 for target marking and pathfinding missions.
He flew over 350 combat missions throughout Europe between September 1940 and 8 May 1945 (VE Day), and was awarded the Knight's Cross of the Iron Cross (No. 711) for flying 200 missions and subsequently the Oak Leaves for having successfully completed 300 combat missions, becoming the highest-decorated German Jabo (Schlachtflieger) pilot of the war. He finished the war as a major commanding a total of three squadrons, I./SKG 10, III./KG 51 and NSG 20; all were equipped with variations of fast nocturnal attack aircraft based on the Fw 190.

Leutnant Wilhelm Crinius Knights Cross with Oak Leaves

Wilhelm Crinius (2 December 1920 – 26 April 1997) was a Luftwaffe fighter ace during World War II. A flying ace or fighter ace is a military aviator credited with shooting down five or more enemy aircraft during aerial combat. Crinius is credited with 114 aerial victories claimed in approximately 400 combat missions. He recorded 100 victories over the Eastern Front. Of his 14 victories claimed over the Western Front, one was a four-engined bomber.On 23 September 1942, Crinius became the only German fighter pilot to be awarded the Knight's Cross of the Iron Cross and the Knight's Cross of the Iron Cross with Oak Leaves simultaneously.

In February 1942, Gefreiter (lance corporal) Crinius was posted to 3. Staffel (3rd squadron) of Jagdgeschwader 53 (JG 53—53rd Fighter Wing) based in Sicily.In March and April 1942, he flew 60 missions over Malta. On 1 April, he was promoted to Unteroffizier (non-commissioned officer). In May 1942, I./JG 53 was transferred to the Eastern Front near Kursk. Crinius achieved his first victories on 9 June when he shot down two Il-2 Sturmoviks. On 8 July, Crinius shot down two Douglas Boston bombers west of Voronezh, although his aircraft was hit by Russian anti-aircraft fire and he was forced to belly-landed his Messerschmitt Bf 109 F-4 (Werknummer 10243—factory number) between the enemy lines, where he was rescued by a German patrol and safely returned to his unit.

In July 1942, I./JG 53 was sent to the southern sector of the Eastern Front, where Crinius claimed his 15th kill on 1 August. He claimed his 24th victory on 11 August 1942. The next day I./JG 53 relocated from Bereska to Tusov, closer to the front and Crinius shot down three Mikoyan-Gurevich MiG-3s, bringing his total to 27 victories. Crinius recorded his 49th victory on 27 August which was also the 1,000th victory for I. Gruppe (1st group) of JG 53.After his 55th victory on 1 September he was promoted to Feldwebel (Sergeant). Hereafter Crinius was particularly successful, claiming some 40 victories in August and 46 victories in the timeframe 1–22 September, including his 100th on 22 September. He was the 22nd Luftwaffe pilot to achieve the century mark.

Together with Friedrich-Karl Müller, Crinius received the Knight's Cross of the Iron Cross with Oak Leaves (Ritterkreuz des Eisernen Kreuzes mit Eichenlaub) on 23 September 1942. He was the 127th member of the German armed forces to be so honored. The presentation was made by Adolf Hitler in October at the Führerhauptquartier Werwolf, Hitler's headquarters located in a pine forest about 12 kilometres (7.5 mi) north of Vinnytsia, in Ukraine. Three other Luftwaffe officers were presented with the Oak Leaves that day by Hitler, Oberleutnant Müller, Oberleutnant Wolfgang Tonne and Leutant Hans Beißwenger. Crinius was promoted to Leutnant der Reserve (second lieutenant of the reserves) on 1 October 1942. Following the presentation, Müller, Tonne and Crinius were ordered to Berlin where they made a propaganda appearance at the "House of the Press".

In November 1942, Crinius relocated with I./JG 53 to Tunisia. In Africa, Crinius claimed another 14 victories, including a B-17 Flying Fortress on 26 December 1942 over Bizerte. On 13 January 1943, he engaged in aerial combat with Royal Air Force (RAF) Supermarine Spitfire fighters near El Kala, Crinius' aircraft was hit and he was wounded in the thigh. Breaking off combat, he headed for his base but his engine then caught fire. He ditched his damaged Bf 109 G-2 (Werknummer 10805) in the sea. He spent 24 hours in the water before being rescued by French sailors and Arabs. After hospitalisation for his wounds, Crinius became a prisoner of war.

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