Seiko Cal. 4550 - 551

The Seiko 4550-551 represents an important milestone in Seiko's 1998 lineup. Powered by the 4550 caliber with 20j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-70420cc4ec45]

Also known as: World Timer

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

13.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1998

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