Seiko Cal. 4438 - 430

The 4438-430 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4438 caliber with 33j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-265cb229fd41]

Also known as: Monster, Bullhead

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

12.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1980

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