Seiko Professional 600 6159-7010

A Seiko Automatic Professional 600 titanium cased gentleman's diver's wristwatch, Ref. 6159-7010, circa March 1975, with signed and jewelled 6159B caliber movement, the signed black dial with luminous hour markers and date aperture, the 'Tuna' case with black rotating bezel, the signed case back detailed '6159-7010' and numbered '532475', case diameter 5cm, the original signed strap fitted with a dive compass.