Seiko Cal. 4480 - 736

This Spring Drive model from 1972 features a 41mm PVD Black case. Powered by the 4480 caliber with 20j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-28a6b4ed1b98]

Also known as: Tuna, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1972

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