Seiko Cal. 4431 - 277

The 4431-277 is a sought-after Solar piece from Seiko's golden era. With its 21mm lug width and 10.5mm profile, it sits comfortably on most wrists. [seikata-wm-a092b81edf41]

Also known as: Sumo, Sea Horse

Specifications

Movement

Solar

Case Material

Titanium

Case Width

35mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Navy

Jewels

21j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1981

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