Seiko Cal. 4430 - 847

This Spring Drive model from 1968 features a 41mm Two-Tone case. Powered by the 4430 caliber with 20j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-a6aa745b97bd]

Also known as: Tuna, Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

9.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

20j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1968

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