Seiko Cal. 4421 - 313

The Seiko 4421-313 represents an important milestone in Seiko's 1969 lineup. Powered by the 4421 caliber with 18j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-25784fc90167]

Also known as: Sumo, UFO

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

36mm

Case Thickness

8.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Black

Jewels

18j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1969

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