To start out, I am not an expert on Top Break S&Ws.
The cartridge marking is odd, the US Army never adopted the 44 Russian as a service cartridge. The only other similar marking was on a Spanish copy of an N frame Hand Ejector.
A lot of S&W 44 Top breaks went to Mexico, and Central and South America for Police or Military organizations.
Try the S&W Collectors Association.
Post what you find out please.
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