Seiko Cal. 4438 - 504

Seiko 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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