Seiko Cal. 4531 - 722

The 4531-722 is a sought-after Hand-Winding piece from Seiko's golden era. With its 20mm lug width and 9.2mm profile, it sits comfortably on most wrists. [seikata-wm-79788bb58dc3]

Also known as: Sumo, UFO

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

9.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Black

Jewels

22j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1982

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