Seiko Cal. 4537 - 581

The Seiko 4537-581 represents an important milestone in Seiko's 1998 lineup. Powered by the 4537 caliber with 24j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-20c7893fc16f]

Also known as: Helmet, Crown

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

11.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

White

Jewels

24j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1998

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