Seiko Cal. 4537 - 649

This Spring Drive model from 1991 features a 35mm Titanium case. Powered by the 4537 caliber with 32j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-f2fc5cf6372d]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Burgundy

Jewels

32j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1991

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