Seiko Cal. 3831 - 708

This Spring Drive model from 1981 features a 38mm PVD Black case. The Bidirectional bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-ab4e86f1d10c]

Also known as: Sportsmatic, Crown

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

15.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Green

Jewels

32j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1981

Related Models

• Seiko 6358-988
• Seiko 5249-280
• Seiko 7159-264
• Seiko 6657-847
• Seiko 0777-447
• Seiko 7075-179
• Seiko 3810-353
• Seiko 5611-924
• Seiko 7121-390
• Seiko 4465-729
• Seiko 5225-313
• Seiko 7090-792