Seiko Cal. 4427 - 637

Seiko 4427-637

The Seiko 4427-637 represents an important milestone in Seiko's 1982 lineup. Powered by the 4427 caliber with 26j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-7a96e8f20c8a]

Also known as: Turtle, Flighty

Specifications

Movement
Quartz
Case Material
Gold-Plated
Case Width
41mm
Case Thickness
9.8mm
Lug Width
21mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
110m
Dial Color
White
Jewels
26j
Frequency
28,800 bph
Power Reserve
49 hours
Year
1982

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