Seiko Cal. 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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