Seiko Cal. 5631 - 711

The 5631-711 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5631 caliber with 23j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-0c1405f7740b]

Also known as: Panda, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

12.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Green

Jewels

23j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1983

Related Models

• Seiko 4413-105
• Seiko 6357-473
• Seiko 6374-625
• Seiko 7077-125
• Seiko 5673-879
• Seiko 6322-522
• Seiko 6623-261
• Seiko 3859-243
• Seiko 7148-710
• Seiko 5210-347
• Seiko 7069-165
• Seiko 6167-289