Seiko Cal. 6131 - 684

The Seiko 6131-684 represents an important milestone in Seiko's 1971 lineup. The Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-3e88928c5335]

Also known as: Baby Tuna, Flighty

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

10.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1971

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