Seiko Cal. 7181 - 743

Released in 1971, the Cal. 7181 with design code 743 was part of Seiko's domestic market collection. It features a Green dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-fdbc8ee4ecb7]

Also known as: Tuna, Helmet

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

11.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Green

Jewels

19j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1971

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