Seiko Cal. 3870 - 320

The 3870-320 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3870 caliber with 26j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-cb4726ba684c]

Also known as: Silverwave

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

12.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

Navy

Jewels

26j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1982

Related Models

• Seiko 7185-414
• Seiko 4588-338
• Seiko 3872-471
• Seiko 7070-904
• Seiko 6240-648
• Seiko 6345-763
• Seiko 6266-525
• Seiko 6243-157
• Seiko 4435-904
• Seiko 0794-581
• Seiko 7085-280
• Seiko 5239-790