Seiko Cal. 6331 - 409

The 6331-409 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6331 caliber with 20j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-03c5c7cc41fe]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

9.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1984

Related Models

• Seiko 4598-459
• Seiko 3893-646
• Seiko 5241-544
• Seiko 5274-885
• Seiko 6196-181
• Seiko 5682-777
• Seiko 5613-781
• Seiko 0722-966
• Seiko 6351-611
• Seiko 6643-307
• Seiko 6116-296
• Seiko 0770-188