Seiko Cal. 4437 - 864

Seiko 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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