Something to ID

Hi All

I bought something like that. Fits 8x57R A-Base, M1888 ammunition. But what was it for? Cases calibrator ?? Any suggestions ?

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To me it looks like a case gauge. Though those I saw so far all were cut open on the side so the case could be seen and how tight the fit of the profile was.

Nice find!

It looks much the same as American commercial combination case length (front end) and headspace (back end) gauges.

John Moss