Seiko Cal. 4550 - 828

The Seiko 4550-828 represents an important milestone in Seiko's 1990 lineup. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-c83f19f3c72a]

Also known as: Tuna, Flighty

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

10.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

33j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1990

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