Seiko Cal. 6698 - 578

The 6698-578 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6698 caliber with 31j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-92e29bc1a87d]

Also known as: Rally, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

14.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1980

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