Seiko Cal. 5638 - 964

This Hand-Winding model from 1969 features a 35mm PVD Black case. Powered by the 5638 caliber with 17j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-864ea012f703]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

14.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Green

Jewels

17j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1969

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