Seiko Cal. 5634 - 228

This Spring Drive model from 1986 features a 40mm Titanium case. Powered by the 5634 caliber with 20j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-07944e0ba8ce]

Also known as: World Timer, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

8.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Silver

Jewels

20j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1986

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