Seiko Cal. 4427 - 621

The Seiko 4427-621 represents an important milestone in Seiko's 1986 lineup. Powered by the 4427 caliber with 23j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-02bdb9e59807]

Also known as: Monster, Sumo

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1986

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