Vintage best Sterling Whale Brooch

Hand crafted sterling whale brooch
The hollow brooch is just shy of 3 inches long and 1-1/2" tall
The scales are detailed in the tail area and smooth at his head.
It is marked 925 but no makers ID
Weight is 10.8 grams and it is in vintage, untouched patina.
I wouldn't reccomend over cleaing this piece, it would lose some of its vintage charm.
But that is a personal preference. best