Seiko Cal. 5631 - 148

The 5631-148 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5631 caliber with 35j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-195b7089a531]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

35j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1983

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