Seiko Cal. 6231 - 726

Released in 1973, the Cal. 6231 with design code 726 was part of Seiko's domestic market collection. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-07fe73ce37b9]

Also known as: Tuna, World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

12.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Burgundy

Jewels

29j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1973

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