Seiko Cal. 4556 - 536

The Seiko 4556-536 represents an important milestone in Seiko's 1991 lineup. Powered by the 4556 caliber with 21j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-d9af630e659c]

Also known as: Helmet, Rally

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

42mm

Case Thickness

8.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

21j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1991

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