Seiko Cal. 5637 - 776

This Spring Drive model from 1965 features a 45mm PVD Black case. The Coin-Edge bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-76de7aebf41c]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Navy

Jewels

35j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1965

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