Seiko Cal. 4550 - 717

The Seiko 4550-717 represents an important milestone in Seiko's 1987 lineup. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-8f4572afc2fa]

Also known as: Crown

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

45mm

Case Thickness

8.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

22j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1987

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