Seiko Cal. 3868 - 842

This Hand-Winding model from 1977 features a 37mm Two-Tone case. Powered by the 3868 caliber with 33j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-5a52ceeab906]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

11.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Burgundy

Jewels

33j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1977

Related Models

• Seiko 6356-817
• Seiko 5276-440
• Seiko 7018-702
• Seiko 4420-508
• Seiko 7129-944
• Seiko 6138-431
• Seiko 5683-793
• Seiko 5229-252
• Seiko 7083-702
• Seiko 7138-237
• Seiko 5633-363
• Seiko 5642-744