Quote Originally Posted by Brit plumber View Post
the last version I’ve encountered, a cross between a Mk3 and a Mk2 type. This type is a Mk2 type with a machined curve in the leading edge in the same style as the Mk3, this is the most common type observed and could possibly date from 1945 or more probably, the 1950s FTR programme.
Well, well. I saw one of those a few months ago and wondered what it was. I think I vaguely assumed it was some sort of FTR modification to lighten a Mk2 sleeve.

Mark