Seiko Cal. 0731 - 823

Released in 1970, the Cal. 0731 with design code 823 was part of Seiko's domestic market collection. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-cea4f9ed77da]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Burgundy

Jewels

23j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1970

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