Vintage MCM Napkin Ring Holders

Vintage lot of 10 MCM butterscotch & slate gray napkin holders in excellent condition. I was told these are Bakelite, but they may be a heavy plastic or resin. Purchased years ago from an estate in southern Arizona. There are four butterscotch and six gray holders. They have nice weight and look quite stunning on the table. Light scratches on one butterscotch as shown. Please view photos well. Approximate Measurements- H- 1.25” L- 2” Collective Weight- 14.6 oz