Seiko Cal. 4528 - 311

The Seiko 4528-311 represents an important milestone in Seiko's 1988 lineup. The Rotating bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-0766512f44dd]

Also known as: Sumo, Helmet

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1988

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