Seiko Cal. 6657 - 868

The 6657-868 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6657 caliber with 17j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-c118ed5d5f7c]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

13.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

110m

Dial Color

Navy

Jewels

17j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1979

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