Seiko Cal. 5663 - 238

The 5663-238 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5663 caliber with 28j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-d6aed734446f]

Also known as: Rally, Bellmatic

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Burgundy

Jewels

28j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1977

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