Seiko Cal. 6631 - 489

The Seiko 6631-489 represents an important milestone in Seiko's 1982 lineup. Powered by the 6631 caliber with 35j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-b6797fd9462b]

Also known as: Rally, Golden Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

14.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Green

Jewels

35j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1982

Related Models

• Seiko 4537-887
• Seiko 3879-137
• Seiko 5286-693
• Seiko 4436-650
• Seiko 5228-267
• Seiko 4519-951
• Seiko 6667-436
• Seiko 4424-957
• Seiko 5699-563
• Seiko 7014-344
• Seiko 4472-195
• Seiko 6198-199