Seiko Cal. 4491 - 747

The Seiko 4491-747 represents an important milestone in Seiko's 1979 lineup. It features a Champagne dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-980d19d85ec7]

Also known as: Sumo, World Timer

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

13.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Champagne

Jewels

26j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1979

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