From my private collection I let here go this rarely seen Swiss Made Tissot Automatic Bumper from 1952, ref. 6587-1 with an automatic Cal. 31-1 17 jewels inside. www.ranfft.de/cgi-bin/bidfun-db.cgi…swk&Tissot_31_1 Case 36 mm circa without crown with stainless steel back, original dial with a nice …