Seiko Cal. 4431 - 716

The Seiko 4431-716 represents an important milestone in Seiko's 1978 lineup. It features a Black dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-7c7acaf904c1]

Also known as: Sumo, Helmet

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

9.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

150m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1978

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