Seiko Cal. 5634 - 942

The 5634-942 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5634 caliber with 20j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-1b3b06103b5c]

Also known as: Tuna, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

14.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

20j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1987

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