Seiko Cal. 6331 - 678

The 6331-678 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Acrylic crystal and offers 200m of water resistance. [seikata-wm-b17ef8cb6f30]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

14.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Black

Jewels

33j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1977

Related Models

• Seiko 7021-934
• Seiko 4492-936
• Seiko 6312-477
• Seiko 6248-575
• Seiko 6658-199
• Seiko 7158-124
• Seiko 0723-234
• Seiko 0733-204
• Seiko 5696-878
• Seiko 6617-322
• Seiko 5621-409
• Seiko 3843-814