Seiko Cal. 7031 - 363

Released in 1974, the Cal. 7031 with design code 363 was part of Seiko's domestic market collection. The Fixed bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-967aa86220ea]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

12.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Burgundy

Jewels

25j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1974

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