What is the view like up a barrel with this device? Any magnification? Focus adjustment? Odd that it is described as a "mirror" when it is plainly a periscope.
Wray Optical Works Ltd., est. 1850, Ashgrove Road, Bromley Hill, Kent. (SIMA Handbook, 1952.)
Better info here: Wray (Optical Works) :: Rochester Avionic Archives
Wonder who got that job then, and how!?Despite Wray holding contracts for Head Up Display optics, Kershaws never made any and ultimately lost the business which was quite short-sighted of the Rank Organisation.
Wray (lenses) - Wikipedia
Learned something else tonight: the Britishsingle lens reflex: Wrayflex