Signed Navajo Sterling Silver Watch Band Plates

Vintage sterling silver watch band plates with a Navajo hallmark. They are set with blue glass stones that look like turquoise, but it is not. 

Plates meausre 1 1/8" wide by 1 1/2" long. Pin tubes measure 16mm long and the band slot is 14mm wide. Together they weigh 20 grams. Marked sterling.