Seiko Cal. 4550 - 655

This Hand-Winding model from 1981 features a 38mm Titanium case. The Inner Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-1f8c7b1c0ef7]

Also known as: Sumo, Emperor

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

38mm

Case Thickness

12.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

White

Jewels

18j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1981

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