Seiko Cal. 4438 - 504

The 4438-504 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4438 caliber with 28j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-7ffad525e7cd]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Silver

Jewels

28j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1967

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