A mysterious lens - Help need with identification please

[Steven Tribe]

I did say it was a Petzval! Don't mix-up the sequence of the pair! The "heavier " lens is cemented achromat which can be used by itself as a photographic lens. The military ( or state organisation - like coastgaards or national park service) would have used this number for requisitions and stores location.

[Pete Watkins]

Photographic items ordered by the British military usually start with 14A then the actual order number.
Pete