Seiko Cal. 4531 - 664

Released in 1967, the Cal. 4531 with design code 664 was part of Seiko's domestic market collection. With its 20mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-7d3a8eac8fc4]

Also known as: UFO, Crown

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

15.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Champagne

Jewels

20j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1967

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