Seiko Cal. 6628 - 630

The 6628-630 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6628 caliber with 25j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-45284d7ea6fe]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

42mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Champagne

Jewels

25j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1968

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