Seiko Cal. 4550 - 691

The Seiko 4550-691 represents an important milestone in Seiko's 1981 lineup. It features a Champagne dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-1ecd5ccb4a2c]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Champagne

Jewels

32j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1981

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