Nash American Motors Rambler Jewelry 10K Gold Diamond Pins 50s 60s Promotional

Offered is a pair of 1950s 1960s dealership promotional pins. One is a Nash pin, marked 'Spies' (I believe) on the back, with what appears to be a diamond. I believe the pin may be 10k because of the diamond, not marked though. The other is an American Motors pin, marked 10k. These pieces were acquired from the estate of a gentleman who was in the automobile business from the early 1950s through the 1970s. Condition is nice on both.