Seiko Cal. 4537 - 591

The 4537-591 is a sought-after Solar piece from Seiko's golden era. Powered by the 4537 caliber with 28j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-4cc5aee4fc11]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Titanium

Case Width

36mm

Case Thickness

14.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

80m

Dial Color

Champagne

Jewels

28j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1979

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