Seiko Cal. 7131 - 187

Seiko 7131-187

This Hand-Winding model from 1968 features a 35mm Two-Tone case. Powered by the 7131 caliber with 17j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-873f3f343ccb]

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
35mm
Case Thickness
9.9mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
80m
Dial Color
White
Jewels
17j
Frequency
21,600 bph
Power Reserve
67 hours
Year
1968

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