Aircraft Periscope
In the local last night the landlord showed me a RAF aircraft periscope that he bought off a mate. Thinking, quite incorrectly, that I knew about these things he asked me all about it. Well having all the time of a recently unemployed avaitor I thought I would investigate....... . . .It's stored in an olive green wooden box with the following markings:. .Aircraft Periscope Type 6B/2799 or 6B/2764 c/w transit.. .Any ideas as to what it was used for and on what aircraft types or any links to sites that might be able to help me in the quest for info(and free beer)?
Thanks