Seiko Cal. 4430 - 920

The Seiko 4430-920 represents an important milestone in Seiko's 1966 lineup. Powered by the 4430 caliber with 21j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-dfba068eef4d]

Also known as: Tuna, Flighty

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

35mm

Case Thickness

12.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

White

Jewels

21j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1966

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