Seiko Cal. 6688 - 690

This Spring Drive model from 1996 features a 45mm PVD Black case. Powered by the 6688 caliber with 29j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-2900129fe84e]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

15.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Black

Jewels

29j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1996

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