Seiko Cal. 4550 - 591

The Seiko 4550-591 represents an important milestone in Seiko's 1998 lineup. Powered by the 4550 caliber with 27j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-c54d84003561]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

35mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Black

Jewels

27j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1998

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