Seiko Cal. 4537 - 631

The 4537-631 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4537 caliber with 23j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-42442e80a4ea]

Also known as: Bellmatic, Navigator

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

41mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Green

Jewels

23j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1992

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