Seiko Cal. 5663 - 631

The 5663-631 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5663 caliber with 33j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-d209d176db78]

Also known as: Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

14.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Cream

Jewels

33j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1966

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