Seiko Cal. 4440 - 670

Seiko 4440-670

This Hand-Winding model from 1980 features a 37mm Hardlex-Coated Steel case. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-76f7b4c06af3]

Also known as: Monster, Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
9.9mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
100m
Dial Color
Black
Jewels
26j
Frequency
21,600 bph
Power Reserve
60 hours
Year
1980

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