Seiko Cal. 6641 - 735

The Seiko 6641-735 represents an important milestone in Seiko's 1966 lineup. The Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-13b3312db5fa]

Also known as: Monster

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

10.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

White

Jewels

30j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1966

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