Seiko Cal. 7181 - 526

The Seiko 7181-526 represents an important milestone in Seiko's 1977 lineup. Powered by the 7181 caliber with 29j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-6396b8df85f7]

Also known as: Tuna, UFO

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

12.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Black

Jewels

29j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1977

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