Seiko Cal. 6331 - 963

The 6331-963 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6331 caliber with 35j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-f665d9f3c459]

Also known as: Monster

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

38mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Silver

Jewels

35j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1965

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