Seiko Cal. 5628 - 639

Seiko 5628-639

The 5628-639 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 5628 caliber with 25j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-53f5746a85c4]

Also known as: Sumo, Crown

Specifications

Movement
Kinetic
Case Material
Stainless Steel
Case Width
39mm
Case Thickness
10.0mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
60m
Dial Color
White
Jewels
25j
Frequency
28,800 bph
Power Reserve
61 hours
Year
1966

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seikata-wm-53f5746a85c4