Seiko Cal. 4437 - 320

Seiko 4437-320

The 4437-320 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4437 caliber with 25j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-58caf3235ac2]

Also known as: Emperor

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
42mm
Case Thickness
12.5mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
120m
Dial Color
Green
Jewels
25j
Frequency
21,600 bph
Power Reserve
48 hours
Year
1973

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