Seiko Cal. 4550 - 813

The Seiko 4550-813 represents an important milestone in Seiko's 1981 lineup. Powered by the 4550 caliber with 17j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-23764514a356]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

10.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

70m

Dial Color

White

Jewels

17j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1981

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