Seiko Cal. 4530 - 920

This Spring Drive model from 1978 features a 41mm Titanium case. Powered by the 4530 caliber with 35j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-985bbc54c5c2]

Also known as: Tuna, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

15.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

35j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1978

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