Vintage Silver Sparrow Bird Brooch

Silver tone, unmarked, vintage brooch in an Art Deco style, patterned in a milgrain/false marcasite style. (No marcasite stones present; the brooch is entirely metal). Measures 1.5” from tip to tip. This was sold to me as antique, but it seems to me to be likelier an Art Deco or Art Deco revival piece (ie 20th century). The depicted bird is likely a sparrow or dove. It is a gunmetal silver tone, so I cannot ID the material; it might be another alloy or pot metal, or it might be unmarked sterling silver. It is not magnetic, but the brooch pin is a standard locking safety clasp, so it is likely mid-20th century. The seams on the side suggest it was stamped or molded. It would also make an excellent pendant strung on a chain! Sold as-is, in excellent vintage condition with no notable flaws!