Seiko Cal. 7157 - 831

The Seiko 7157-831 represents an important milestone in Seiko's 1973 lineup. Powered by the 7157 caliber with 20j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-3f9866e4a608]

Also known as: Panda, Golden Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

9.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Navy

Jewels

20j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1973

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