Mystery item what the heck is it?

Profile picture for user beachcomber

Member for

8 years 9 months

Posts: 249

I had some aviation goodies arrive from an auction house and this was in with it, I've no idea the only wording is R107 it is a prism hand scratched on the rear is the word light. I thought it could come from a gun sight I don't know has anyone any thoughts. [ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3855048}[/ATTACH][ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3855049}[/ATTACH][ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3855050}[/ATTACH][ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3855051}[/ATTACH]
Attachment Size
IMG_4231.JPG 331.32 KB
IMG_4232.JPG 326.17 KB
IMG_4233.JPG 350.94 KB
IMG_4234.JPG 303.4 KB
Original post

Member for

11 years 8 months

Posts: 2,841

Hmm. Looking at what look like precision-machined lugs (with inset, probably spring-loaded, ball bearings to hold it hard against the opposite surfaces) makes me think it is a calibrating, collimating or sighting device for a piece of equipment which requires precise alignment. The viewer peers into the 45 degree-angled mirror to view along the sighting path. This could be a gun, gun sight or optical equipment alignment tool. It doesn't look like an operational/flying part to me. Anon.

Member for

11 years

Posts: 825

Reminds me of the top of a periscopic sextant, probably an internal component anyway.
Profile picture for user bazv

Member for

14 years 8 months

Posts: 5,811

I agree with Anon - looks similar to a Collimator/Sighting/Harmonization/Levelling device,the 6 x Location 'Lugs' look very much like collimator/levelling type mountings/locators.