Seiko Cal. 4551 - 618

The Seiko 4551-618 represents an important milestone in Seiko's 1983 lineup. Powered by the 4551 caliber with 25j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-4d019a598eb5]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

11.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Navy

Jewels

25j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1983

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