Seiko Cal. 4438 - 648

This Kinetic model from 1968 features a 36mm Hardlex-Coated Steel case. Powered by the 4438 caliber with 22j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-7463c015642d]

Also known as: Tuna, Bellmatic

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

12.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Cream

Jewels

22j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1968

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