Seiko Cal. 3871 - 685

The 3871-685 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3871 caliber with 28j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-553bbf56fdb8]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

13.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Burgundy

Jewels

28j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1973

Related Models

• Seiko 3863-644
• Seiko 6198-146
• Seiko 3864-342
• Seiko 4526-800
• Seiko 7068-321
• Seiko 3840-417
• Seiko 4474-677
• Seiko 3829-349
• Seiko 6653-456
• Seiko 7133-832
• Seiko 6658-583
• Seiko 0739-258