Seiko Cal. 4425 - 440

Seiko 4425-440

This Hand-Winding model from 1970 features a 46mm Titanium case. Powered by the 4425 caliber with 27j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-6555e589b487]

Also known as: Monster, Sumo

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
46mm
Case Thickness
8.7mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
170m
Dial Color
Navy
Jewels
27j
Frequency
28,800 bph
Power Reserve
46 hours
Year
1970

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seikata-wm-6555e589b487