Small differences in the recent Seamasters posted presents the need for details. This model has the reference number 166.002, differing from 166.001 having white gold hour markers on the dial and steel hands as opposed to the other model´s yellow gold dial indexes, Omega logo and hands. This watch has been fully serviced (Sep 2020) and comes with 12 months watchmakers warranty. It is a very nice example, but you should know a couple of things about it: The case has scratches and an original Omega crystal was presently unobtainable. The diameter of the “SGR” case is 34,5mm, and the serial number 21877xxx dates it to ca 1965.