1971 SEIKO DX Automatic Watch Day/Date Indicator Cal. 6106C Hack Mecha – SECOND HAND HOROLOGY
Late 60s early 70s. Seiko automatic DX 17 jewels 6106-8439 and Seiko automatic 17 jewels 7005-8040. Picked up for $10 each. Still keeping good time. : r/Seiko