Seiko Cal. 6631 - 260

The 6631-260 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6631 caliber with 22j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-7128170db0c3]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1990

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