Large vintage articulated filigree fish pendant

This is a great piece, with lots of movement and filigree detail over its length of almost 4-3/4", including the bail. It pays homage to fish pendants crafted in China, but I have seen the virtually identical piece attributed to Vendome, the Coro subsidiary founded in the late 40s and active for about 30 years. It looks like silver but does not test as such. In very good condition, with a bit of tarnish here and there. Cross listed in Men's and Women's markets.