Seiko Cal. 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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