Seiko Cal. 4550 - 686

The Seiko 4550-686 represents an important milestone in Seiko's 1977 lineup. The Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-0a0b17260839]

Also known as: Helmet, Flighty

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

12.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1977

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