Seiko Cal. 6688 - 857

The Seiko 6688-857 represents an important milestone in Seiko's 1989 lineup. Powered by the 6688 caliber with 31j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-d31d964b5455]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

39mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Navy

Jewels

31j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1989

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