Early Navajo Fluted Button Pendant and Chain Necklace with Turquoise

Vintage Navajo sterling silver pendant and chain necklace. The pendant has two huge solid fluted buttons and a rectangular natural turquoise stone that has attributes of the Pilot Mountain Mine. Pendant is 1 3/4" long by 11mm wide. The box chain is a replacement and measures 17" long. Weight: 8.9 grams. Rare design.