Seiko Cal. 6642 - 733

Released in 1981, the Cal. 6642 with design code 733 was part of Seiko's domestic market collection. It features a Navy dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-53604fab39fc]

Also known as: Turtle, Sumo

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

40m

Dial Color

Navy

Jewels

21j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1981

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