Seiko Cal. 7180 - 421

This Spring Drive model from 1979 features a 37mm Gold-Plated case. It features a Black dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-75030e4a6102]

Also known as: Tuna, Arnie

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

11.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Black

Jewels

32j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1979

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