Seiko Cal. 5638 - 960

The Seiko 5638-960 represents an important milestone in Seiko's 1972 lineup. Powered by the 5638 caliber with 35j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-4fc9c86485aa]

Also known as: Samurai, Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

34mm

Case Thickness

8.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

White

Jewels

35j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1972

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