Seiko Cal. 4531 - 635

The 4531-635 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4531 caliber with 27j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-d16d45f79e7c]

Also known as: Panda, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

12.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

Burgundy

Jewels

27j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1970

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