Kreisler white gold plate band. Broken winding knob included. Part of a large 30+ pieces auction watch and parts lot from USA private auctioneer acquired Dec 2020. No information specifics. 10K RGP case, crystal stained but ok, was opened and gently cleaned.
Sorry for the picture quality, had to redo scale several times, this being my first upload here on this site, between your maximum and minimum sizes.
Thank you, Lisa