Seiko Cal. 5686 - 240

The 5686-240 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5686 caliber with 21j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-750d99d7842d]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

15.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

130m

Dial Color

Cream

Jewels

21j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1987

Related Models

• Seiko 4515-937
• Seiko 7131-448
• Seiko 4541-807
• Seiko 4520-998
• Seiko 5256-613
• Seiko 0769-185
• Seiko 0764-335
• Seiko 6215-591
• Seiko 6312-224
• Seiko 5693-178
• Seiko 6113-258
• Seiko 4463-796