Vintage Unsigned Navajo Native American Sterling Silver Turquoise Pendant

Dating to the 1970s or so, here's a Sterling Silver (tested, not marked) teardrop shaped pendant.  While there is no makers mark on the piece, the reverse bears a scratched in 15 - perhaps a design number.  The pendant features a natural turquoise cab and small claw (badger, I believe) as well as a single leaf applique, 3 balls of silver and a bit of light stamping to the border complete the design.  The piece measures 1-3/4" high (not including the top bale) x 1-1/4".  Weight is 15 grams.  Very nice condition with no problems I can spot.  Just needs a chain - mine is for display purposes only.