Seiko Cal. 4525 - 640

The Seiko 4525-640 represents an important milestone in Seiko's 1999 lineup. Powered by the 4525 caliber with 25j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-1ca38162303a]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

46mm

Case Thickness

9.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

25j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1999

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