Seiko Cal. 5664 - 531

This Hand-Winding model from 1991 features a 41mm Two-Tone case. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-501ac0218def]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

10.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Navy

Jewels

26j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1991

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