Seiko Cal. 6331 - 343

The 6331-343 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6331 caliber with 34j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-efd1519cffab]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

9.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

34j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1971

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