Seiko Cal. 6331 - 302

The Seiko 6331-302 represents an important milestone in Seiko's 1966 lineup. With its 18mm lug width and 14.8mm profile, it sits comfortably on most wrists. [seikata-wm-a456cffba52e]

Also known as: UFO, Crown

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

14.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Black

Jewels

21j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1966

Related Models

• Seiko 7065-893
• Seiko 7172-621
• Seiko 3896-949
• Seiko 6399-109
• Seiko 4538-107
• Seiko 5234-513
• Seiko 4481-637
• Seiko 6291-226
• Seiko 7176-940
• Seiko 5234-266
• Seiko 0722-494
• Seiko 5690-518