Seiko Cal. 6631 - 603

The 6631-603 is a sought-after Solar piece from Seiko's golden era. Powered by the 6631 caliber with 23j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-e43f3edaeade]

Also known as: Shogun, Baby Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

41mm

Case Thickness

8.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1982

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