Seiko Cal. 4555 - 241

The Seiko 4555-241 represents an important milestone in Seiko's 1966 lineup. Powered by the 4555 caliber with 22j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-f1055e9fed4b]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

100m

Dial Color

Black

Jewels

22j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1966

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