This very nice HO gauge locomotive by Liliput is 4005 a Class IV h  locomotive of the Grand Duchy of Baden State Railway (German: Großherzoglich Badische Staatseisenbahnen, G.Bad.St.E.) in DR black livery, it has running number 18 323

These locos were express locomotives with a 4-6-2 (Pacific) wheel arrangement. The locomotives were ordered in 1915 and were delivered in three series between 1918 and 1920; they were allocated to the locomotive depot (Bahnbetriebswerk, Bw) at Offenburg. They were used on the Rhine Valley route between Frankfurt and Basel, among other things, in powering the Rheingold. 

When the last IV h were delivered in 1920, the Badische Staatsbahn had already merged into the Deutsche Reichsbahn. They took over all twenty locomotives as class 18.3 and gave the three series the fleet numbers 18 301–303, 311–319 and 321–328.

Towards the end of the 1920s, the locomotives in Baden were replaced by standard class 01 locomotives and used further north. In 1933 the first locomotives came to Koblenz, where they served as a reserve for the Rheingold and ran as scheduled on the Saarbrücken – Frankfurt route. From 1935, the IV h were to be found in Bremen; from there they were used on the north German lowland routes, for which they were well suited. Here staff got along better with the locomotives; and after some detail improvements, it became clear that the IV h was even superior to the class 03 locomotives that were 15 years younger. From 1942, all locomotives in the series were stationed in Bremen.

During testing in the 1930s, the 18 328 reached speeds of up to 155 km/h (96 mph), and its good running characteristics were noticeable. After installing stronger brakes and softer springs, the maximum permissible speed of the class was therefore increased to 140 km/h (87 mph).

The 18 326 was a victim of the World War II in 1944. The remaining 19 locomotives came to the Deutsche Bundesbahn after the war and were initially withdrawn in 1948 as a small class of non-standard locomotives.

The loco is in excellent condition as you can see in the pictures, I have not tested it but I can see no reason why it would not run, so it it is sold in untested condition, but a complete external visual inspection has shown no reason why this loco would not run and the overall condition is very good. The box is in good if slightly shelf worn condition. 

Overall this is a really nice scale locomotive and would look fantastic on a layout.

Do please have a look at my other listings, I typically have various HO and OO locos on offer as well as an extensive range of imported N gauge locos and other items. 

Note: I do recommend all locos are cleaned & serviced, as they have some age to them even if the quality looks at the highest level (fairly standard advice for all locos!).