Seiko Cal. 6628 - 243

The 6628-243 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6628 caliber with 21j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-82afeec0a766]

Also known as: Sumo, Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Cream

Jewels

21j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1988

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