Seiko Cal. 5633 - 531

The 5633-531 is a sought-after Quartz piece from Seiko's golden era. With its 19mm lug width and 13.0mm profile, it sits comfortably on most wrists. [seikata-wm-bb1ae31f50cf]

Also known as: UFO, Baby Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

13.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

White

Jewels

28j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1966

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