Vintage AGON Swiss Movement Bangle/ Cuff Watch

I totally love this watch - bought it today from a local thrift shop for 60 CENTS. Wind up, keeps perfect time. The crystal is undamaged - no dings, chips or scratches. That in itself is amazing, because I fished it out of a wicker basket full of cheap costume jewelry. Made by the AGON watch company, Switzerland. Robert Triebold Ltd, registered in Mumpf, Geneve. Agon was in business from the 1930s to the 1970s. Does anyone out there have a watch like this? Is the cuff Bakelite or a more modern plastic? A photo search turned up nothing. Thanks!