This is a rare Polerouter reference: 204604-1. On it’s original bracelet, this is an interesting variation of the wide Polerouter theme. Caliber 218-2 and serial 2087xxx dates it before 1965.
All stainless steel case and bracelet, microtor automatic 28 jewel movement, this mid sixties vintage watch has many good qualities going for it. The movement is just thing, study the photos, and enjoy the detailed qualities of a well kept Universal Geneve movement from the early sixties.