Aircraft Periscope

[doomsday]

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

[doomsday]

forgot to mention date on box was 1965.

[Bullethead]

Obviously used by the Maritime Surveillance types when chasing subs. <img src="wink.gif" border="0">

[ft]

Borescope inspection in the days before optic fibre?

Just speculating wildly,. . /ft

[john_tullamarine]

I have no specific knowledge of the particular device .. but might it be just your ordinary old through the roof sextant periscope assembly ? used for taking sun and star shots ...

[mustafagander]

The VC10 and VC15 had a periscope to check the tailplane in flight if necessary. Maybe that's the answer.When did the RAF get their first VC10s??

[Checkboard]

I have transfered this thread to the <a href="http://www.pprune.org/cgibin/ultimatebb.cgi?ubb=forum&f=80&DaysPrune=" target="_blank">Aviation History and Nostalgia</a> forum, where you may get a better response.