Seiko Cal. 4556 - 307

The Seiko 4556-307 represents an important milestone in Seiko's 1971 lineup. Powered by the 4556 caliber with 19j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-9c2640ced77e]

Also known as: Crown

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

12.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Cream

Jewels

19j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1971

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