ALL Swiss made “GRUEN”. From a large watchmaker’s estate. All MANUAL WIND, Swiss made movements. Men size for the era (Unisex today). Octogon (last one) was for ladies. 1 Gruen Very-Thin, 17J, cal 425, ref 425/621 ser B799227, GF band. 2 Gruen Very-Thin, 15J, cal 421, ref 421/527 ser B983207. 3 Gruen Very-Thin, 17J, cal…