1930s Thunderbird Belt Buckle Sterling & Copper Navajo Old Pawn. JK 217

Rare and unusual 1930s Silver and Copper belt buckle with a Thunderbird image. The black background is an old battery casing like they used for the Pueblo battery bird necklaces. Look at the old rocker work in the stamping on the silver edges.
Good vintage patina.
Tested Sterling and Copper and stamped Hand Made. Looks like the By Indians part is missing.
The buckle is 2" x 3 and weighs 67 grams. "
Inventory #JK 217