Seiko Cal. 4440 - 428

Seiko 4440-428

This Hand-Winding model from 1967 features a 35mm Stainless Steel case. Powered by the 4440 caliber with 26j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-309f0b91bf8e]

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
35mm
Case Thickness
13.7mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
130m
Dial Color
Silver
Jewels
26j
Frequency
21,600 bph
Power Reserve
48 hours
Year
1967

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seikata-wm-309f0b91bf8e