Seiko Cal. 3888 - 634

Seiko 3888-634

The 3888-634 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 3888 caliber with 31j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-84326f440ee2]

Specifications

Movement
Kinetic
Case Material
Hardlex-Coated Steel
Case Width
35mm
Case Thickness
14.9mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
30m
Dial Color
Cream
Jewels
31j
Frequency
28,800 bph
Power Reserve
40 hours
Year
1990

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