Vintage Southwest Belt Buckle — Relief Heritage Pewter & Unknown Cabochon

My husband's grandfather left my husband this Vintage southwestern belt buckle.

He passed away in 2005.

I believe he purchased this belt buckle in the 1970s or 1980s.

This belt buckle has a stamp that says Heritage Pewter
and an approx. 1" long cabochon of unknown stone/ material.

See pictures.

The motif is Southwestern depicting a Native American tribal scene 
with an intricate border.

A very nice Vintage piece.

I believe this belt buckle to be Navajo based on my online research,
but it could be of a different tribal affiliation.

I am not an expert.

Please see pictures with ruler.

I did my best to show the colors accurately. Color can vary
across monitors and screens.

The ruler is present in the photo to show relative size.
Ruler is not part of the listing.