Vintage Large Seiko 150M automatic mens SCUBA DIVER's WATCH, Ref. 6309 729A, Day/Date, ALL ORIGINAL, All Stainless Steel, Circa 70s 80s

Serial numbered 600170

All stainless steel case, rotating bezel, stainless steel screw down back case, stainless steel screw down crown.
Large size case : 40 mm. exclude crown.
41 mm. bezel diameter
43 mm. include crown.
45.5 mm. from lug to lug.

SEIKO automatic movement Cal. 6309A is running and keeping time.
The day/date can be quick-set adjusted by rotating crown when crown pulled to step 1.
Day can be set either English or Roman letters.
Time can be adjusted by rotating crown when crown pulled to step 2.

Comes with BRAND NEW original genuine SEIKO rubber band and buckle. No box. No papers.