Seiko Cal. 7155 - 531

Seiko 7155-531

The 7155-531 is a sought-after Hand-Winding piece from Seiko's golden era. The Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-422cfdee422c]

Also known as: Tuna, Bullhead

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
38mm
Case Thickness
9.8mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
40m
Dial Color
Black
Jewels
31j
Frequency
28,800 bph
Power Reserve
55 hours
Year
1970

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