Seiko Cal. 4491 - 643

The Seiko 4491-643 represents an important milestone in Seiko's 1980 lineup. Powered by the 4491 caliber with 25j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-f6f63e92b822]

Also known as: Monster, Silverwave

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

25j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1980

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