Seiko King 6159-7001

A VERY RARE GENTLEMAN'S STAINLESS STEEL SEIKO PROFESSIONAL 300M "GRAIL" HI-BEAT AUTOMATIC DIVERS WRIST WATCHCIRCA 1969, REF. 6159-7001 WITH 'RESIST' DIAL PRODUCED AS A SERVICE REPLACEMENT FOR A VERY SHORT PERIOD DUE TO ISO REGULATIONS (INTERNATIONAL ORGANIZATION FOR STANDARDIZATION) INTRODUCED IN 1970 STATING THAT ALL WATERPROOF WATCHES SHOULD BE BRANDED WATER RESISTANT INSTEAD OF 'PROOF' Movement: Hi-Beat automatic, quick-set date, signed Seiko. Case: Diameter approx. 44mm, "monocoque" case, signed Seiko, numbered, 60 minute rotating bezel, screw-down crown.Strap: Rubber "waffle" dive strap. CONDITION REPORTDial: An original dial in excellent condition, showing some small signs of age.Movement: Working at present.Case: In very good condition, with some scratches due to general use.Strap/Bracelet: In excellent condition.