Seiko Cal. 4439 - 188

Seiko 4439-188

The 4439-188 is a sought-after Automatic piece from Seiko's golden era. The Coin-Edge bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-78861bdc3c8d]

Also known as: Monster, Sumo

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
15.3mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
100m
Dial Color
Green
Jewels
26j
Frequency
21,600 bph
Power Reserve
40 hours
Year
1970

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