Seiko Cal. 5661 - 725

This Automatic model from 1979 features a 42mm Two-Tone case. Powered by the 5661 caliber with 31j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-f121f2fab136]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

15.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1979

Related Models

• Seiko 0757-704
• Seiko 6357-371
• Seiko 7119-502
• Seiko 4572-813
• Seiko 6359-567
• Seiko 5239-523
• Seiko 5679-196
• Seiko 7138-878
• Seiko 0754-557
• Seiko 7038-854
• Seiko 6619-869
• Seiko 7196-154