Seiko Cal. 6628 - 478

The 6628-478 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6628 caliber with 29j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-3ce2ff919b87]

Also known as: Bullhead, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

8.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Cream

Jewels

29j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1974

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