A dull description for a lovely little object. I think the blank is pressed, it is weighty so a high lead content, base and rim are polished, corners and edges are bevelled. Just over 2½ inches tall - a bit less than 7cm.
The figures and boats are in high relief - I have not seen pressing of this detail so assume they must be cut and engraved. When I bought it I thought the three figures were smoking tobacco and the boats suggested tobacco traders. After a clean I now think two of them are smoking opium pipes, so perhaps Chinese opium traders. Someone else thought clogs and Holland...
Any thoughts on how it was made, where, when, depicting...?
So not asking much.

John
Forgot to mention there may be a little monogram bottom right on the front panel.