~~~ as to where they might be from?

I have several "anchor" MOP pieces from South America, but none exactly like the "500" you show... and the same goes for the "CS" monogrammed piece; close, but no exact match.

Please let me know should you ever find out where they're from...

They're nice.

Thanks

[For the rest of the group; sometimes it pays to look thru those pearl button trays at shows; the reverse on some might just be in their original state -- and you'll have a twice-drilled chip, cheap... ]