Seiko Cal. 6648 - 931

The Seiko 6648-931 represents an important milestone in Seiko's 1971 lineup. The Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-3ba2cf8209a7]

Also known as: Emperor

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

36mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

160m

Dial Color

Navy

Jewels

22j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1971

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