What is it No 677?

[Tony Smith]

This Scope has appeared on Ebay as item 310170683746. Any clues as to it's application?
The unusual feature is the two ferrules or rings which appear to clamp over a tube or hollow part of the mounting. A friend has suggested it may be to pass through a mantlet of a turret of an AFV. Possibly?

[Hanno Spoelstra]

Originally Posted by Tony Smith

The unusual feature is the two ferrules or rings which appear to clamp over a tube or hollow part of the mounting. A friend has suggested it may be to pass through a mantlet of a turret of an AFV. Possibly?

Or, possibly, inside the gun barrel for boresighting?

H.