Seiko Cal. 0730 - 641

The 0730-641 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 0730 caliber with 20j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-d11b35070bdc]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

8.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Cream

Jewels

20j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1988

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