Seiko Cal. 6331 - 218

This Spring Drive model from 1976 features a 46mm Gold-Plated case. It features a Champagne dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-9845bd14c764]

Also known as: UFO, Navigator

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Champagne

Jewels

32j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1976

Related Models

• Seiko 6688-104
• Seiko 5679-101
• Seiko 3845-896
• Seiko 6635-378
• Seiko 5661-308
• Seiko 0775-148
• Seiko 5687-874
• Seiko 5642-647
• Seiko 6629-219
• Seiko 6226-869
• Seiko 3867-170
• Seiko 7013-895