Seiko Cal. 5631 - 388

The 5631-388 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5631 caliber with 22j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-f6dee2b21e7b]

Also known as: Panda

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

12.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Navy

Jewels

22j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1986

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