Seiko Cal. 6331 - 309

Released in 1989, the Cal. 6331 with design code 309 was part of Seiko's domestic market collection. Powered by the 6331 caliber with 25j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-ba708829b2f0]

Also known as: Pogue, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

White

Jewels

25j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1989

Related Models

• Seiko 5623-642
• Seiko 4433-882
• Seiko 6222-464
• Seiko 6628-816
• Seiko 0737-139
• Seiko 6110-811
• Seiko 3827-411
• Seiko 7066-291
• Seiko 5282-643
• Seiko 6145-549
• Seiko 4523-491
• Seiko 7051-911