Seiko Cal. 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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