Seiko Cal. 4491 - 397

The Seiko 4491-397 represents an important milestone in Seiko's 1987 lineup. Powered by the 4491 caliber with 36j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-2d6cb557aea6]

Also known as: Monster, UFO

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Cream

Jewels

36j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1987

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