Seiko Cal. 3861 - 488

This Spring Drive model from 1973 features a 38mm PVD Black case. Powered by the 3861 caliber with 27j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-63a9249336cd]

Also known as: Tuna, Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

10.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

White

Jewels

27j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1973

Related Models

• Seiko 0725-373
• Seiko 4571-432
• Seiko 6370-444
• Seiko 0765-629
• Seiko 6135-199
• Seiko 6126-145
• Seiko 4557-567
• Seiko 6222-300
• Seiko 4528-655
• Seiko 4431-358
• Seiko 4469-503
• Seiko 0722-616