Seiko Cal. 7131 - 850

This Spring Drive model from 1965 features a 44mm Gold-Plated case. It features a Burgundy dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-54069535609c]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Burgundy

Jewels

32j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1965

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