Seiko Cal. 4537 - 591

Seiko 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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