Seiko Cal. 5634 - 840

The Seiko 5634-840 represents an important milestone in Seiko's 1972 lineup. Powered by the 5634 caliber with 36j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-b4a2978bc4b8]

Also known as: Silverwave, Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

9.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

90m

Dial Color

White

Jewels

36j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1972

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