Seiko Cal. 4424 - 221

This Spring Drive model from 1967 features a 42mm Two-Tone case. Powered by the 4424 caliber with 21j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-3c550668f6bb]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1967

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