Benham Silk Cover

First Day of Issue - Scientific Achievements

50th Anniversary of The 1st Flight of Whittle's Jet Engine

Condition - Very good

Postmark - RAF Cranwell BFPS 2259 Special Handstamp 5 March 1991

Sealed - No

Information insert - Yes

Address - Printed

Covers are all despatched in board stiffened envelopes