Seiko Cal. 6331 - 721

The 6331-721 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6331 caliber with 33j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-ac97f92ac417]

Also known as: Samurai

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

37mm

Case Thickness

8.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Navy

Jewels

33j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1997

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