Seiko Cal. 4418 - 507

This Hand-Winding model from 1972 features a 41mm Hardlex-Coated Steel case. Powered by the 4418 caliber with 22j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-43604240b8ea]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

14.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Green

Jewels

22j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1972

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