Seiko Cal. 6636 - 725

The Seiko 6636-725 represents an important milestone in Seiko's 1968 lineup. Powered by the 6636 caliber with 36j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-c008bf64ceb5]

Also known as: Monster

Specifications

Movement

Solar

Case Material

Titanium

Case Width

43mm

Case Thickness

8.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Silver

Jewels

36j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1968

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