Seiko Cal. 4437 - 666

Seiko 4437-666

The Seiko 4437-666 represents an important milestone in Seiko's 1983 lineup. Powered by the 4437 caliber with 20j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-5e324326aaf6]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement
Quartz
Case Material
Stainless Steel
Case Width
37mm
Case Thickness
10.6mm
Lug Width
21mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
150m
Dial Color
White
Jewels
20j
Frequency
28,800 bph
Power Reserve
36 hours
Year
1983

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