Seiko Cal. 7140 - 550

Seiko 7140-550

The 7140-550 is a sought-after Spring Drive piece from Seiko's golden era. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-a50f7a196a6f]

Also known as: Helmet, Rally

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
42mm
Case Thickness
13.8mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
30m
Dial Color
Black
Jewels
19j
Frequency
21,600 bph
Power Reserve
36 hours
Year
1974

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