Seiko Cal. 7131 - 577

Seiko 7131-577

The Seiko 7131-577 represents an important milestone in Seiko's 1974 lineup. Powered by the 7131 caliber with 18j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-92eca8f8b7ab]

Also known as: Bellmatic, Golden Tuna

Specifications

Movement
Solar
Case Material
PVD Black
Case Width
40mm
Case Thickness
9.4mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
180m
Dial Color
Green
Jewels
18j
Frequency
21,600 bph
Power Reserve
57 hours
Year
1974

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