Seiko Cal. 6630 - 931

The Seiko 6630-931 represents an important milestone in Seiko's 1971 lineup. Powered by the 6630 caliber with 23j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-22d48a64149b]

Also known as: Samurai, Pogue

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

34mm

Case Thickness

15.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

Black

Jewels

23j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1971

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