Belt Buckle w turquoise, coral marked GM; looking to ID maker

[swin]

Was hoping someone could ID this maker. Thank you!

[TAH]

Here’s a similar buckle stamped Mexico GM…

Vintage Sterling Silver Native America belt Buckle 1970s

[swin]

thanks. that’s interesting.

[mmrogers]

Would definitely have this one tested for silver content. The finish and surface characteristics at first glance look like Nickel. Bezels may be sterling, but maybe not.