Seiko Cal. 4437 - 685

The Seiko 4437-685 represents an important milestone in Seiko's 1976 lineup. Powered by the 4437 caliber with 21j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-8fe3dc2d1ac9]

Also known as: Samurai, Bullhead

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

36mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Navy

Jewels

21j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1976

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