Seiko Cal. 7055 - 637

The 7055-637 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 7055 caliber with 21j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-a74d2cbf14d2]

Also known as: Bellmatic, Crown

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

13.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Silver

Jewels

21j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1979

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