This is a wonderful Retro pin. The Retro period was @1938-1952. This pin is Rose and Yellow Gold and weighs an impressive 17 grams. The clasp works well and it does have a hallmark that may be a smudged Krementz label.
This pin is in excellent Estate condition and would provide decades of distinguished wear. The pin is 1 1/2" in diameter. This pin marries two of the primer motifs of the period, the circle pin and the bow pin. I think that these 1940's pins are very wearable and are enjoying a resurgence of interest at this time.