Seiko Cal. 5681 - 309

This Spring Drive model from 1987 features a 43mm Two-Tone case. Powered by the 5681 caliber with 24j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-8b7ada979d20]

Also known as: Bellmatic, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

9.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1987

Related Models

• Seiko 4530-279
• Seiko 6624-819
• Seiko 3862-290
• Seiko 6697-247
• Seiko 4544-806
• Seiko 6178-958
• Seiko 7157-626
• Seiko 4449-586
• Seiko 7160-803
• Seiko 6181-488
• Seiko 5294-109
• Seiko 7162-499