Seiko Cal. 4531 - 728

The 4531-728 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 180m of water resistance. [seikata-wm-f0e3d41d895e]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1984

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