Seiko Cal. 4556 - 916

The 4556-916 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4556 caliber with 31j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-5746264dbead]

Also known as: Sumo, Pogue

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

14.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1970

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