Seiko Cal. 6631 - 454

The 6631-454 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6631 caliber with 18j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-946fa9cc23de]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Black

Jewels

18j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1999

Related Models

• Seiko 4423-408
• Seiko 6355-923
• Seiko 6252-583
• Seiko 4569-502
• Seiko 6150-504
• Seiko 5644-387
• Seiko 7080-225
• Seiko 6670-253
• Seiko 6697-226
• Seiko 6336-945
• Seiko 4441-621
• Seiko 5689-796