Seiko Cal. 4551 - 311

The Seiko 4551-311 represents an important milestone in Seiko's 1968 lineup. Powered by the 4551 caliber with 29j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-4412fbd4a39c]

Also known as: World Timer, Crown

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

46mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1968

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