Seiko Cal. 7183 - 306

Released in 1973, the Cal. 7183 with design code 306 was part of Seiko's domestic market collection. It features a Green dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-9d6dd4b459ad]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

10.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Green

Jewels

31j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1973

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