Seiko Cal. 5641 - 237

The 5641-237 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5641 caliber with 31j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-4610ecf80ca3]

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

38mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1965

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