@western_estate_sales,
All I can tell you is that is NOT the lion passant hallmark for British/UK sterling, and these do not appear to be British/UK hallmarks at all. They would be considered pseudo-hallmarks, which were against the law in the UK from circa. 1900, but that didn't stop their use in other countries.
A brief google search suggested that these may be North American/USA hallmarks, but for what standard of purity, when, or which manufacturer, I don't know. I would suggest that you continue your research from that starting point.
Tiff & Whiting used a similar-looking arm-and-hammer mark, but the only example shown here is in a completely different shape cartouche, so I don't know if this has anything to do with your piece or not. Bu this is a staring point for you.
https://www.925-1000.com/ax_TifftWhiting.html