Seiko Cal. 6633 - 538

This Quartz model from 1970 features a 43mm Two-Tone case. The Coin-Edge bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-0ea6936726ec]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

43mm

Case Thickness

11.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Silver

Jewels

27j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1970

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