Seiko Cal. 5640 - 237

The Seiko 5640-237 represents an important milestone in Seiko's 1996 lineup. Powered by the 5640 caliber with 30j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-4e25684c347e]

Also known as: World Timer

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

38mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Cream

Jewels

30j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1996

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