Seiko Cal. 5630 - 244

This Spring Drive model from 1977 features a 43mm Titanium case. Powered by the 5630 caliber with 25j jewels beating at 28,800 bph, it delivers a 62 hours power reserve. [seikata-wm-1bc126ccecf7]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Silver

Jewels

25j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1977

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