Seiko Cal. 6631 - 603

The Seiko 6631-603 represents an important milestone in Seiko's 1993 lineup. Powered by the 6631 caliber with 18j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-f6e0ff14cd54]

Also known as: Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

12.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Navy

Jewels

18j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1993

Related Models

• Seiko 7121-966
• Seiko 0767-938
• Seiko 7155-784
• Seiko 7163-170
• Seiko 7155-109
• Seiko 3892-896
• Seiko 5236-646
• Seiko 3876-484
• Seiko 6173-101
• Seiko 6166-678
• Seiko 6113-177
• Seiko 7167-177