Seiko Cal. 5631 - 889

The 5631-889 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5631 caliber with 27j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-73ee3809efcd]

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Silver

Jewels

27j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1981

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