Seiko Cal. 0731 - 369

The 0731-369 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 0731 caliber with 25j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-6f33f0c8087a]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1979

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