Seiko Cal. 4437 - 864

The 4437-864 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4437 caliber with 30j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-9fb8619549ab]

Also known as: Rally, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

12.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Burgundy

Jewels

30j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1986

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