Seiko Cal. 6331 - 310

Released in 1966, the Cal. 6331 with design code 310 was part of Seiko's domestic market collection. It features a Champagne dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-4dc8ed0f4bd8]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

9.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

30m

Dial Color

Champagne

Jewels

29j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1966

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