Seiko Cal. 7183 - 691

The Seiko 7183-691 represents an important milestone in Seiko's 1970 lineup. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-e42046ac6520]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

27j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1970

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