Seiko Cal. 7131 - 565

Seiko 7131-565

The 7131-565 is a sought-after Spring Drive piece from Seiko's golden era. The Bidirectional bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-26e8e5df3635]

Also known as: Tuna, Crown

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
35mm
Case Thickness
15.1mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
100m
Dial Color
Blue Sunburst
Jewels
28j
Frequency
36,000 bph
Power Reserve
48 hours
Year
1987

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