Seiko Cal. 3860 - 550

This Spring Drive model from 1991 features a 37mm Two-Tone case. With its 18mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-7683aa7830fe]

Also known as: Sumo, Pogue

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

15.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Navy

Jewels

30j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1991

Related Models

• Seiko 7063-858
• Seiko 4466-286
• Seiko 4520-274
• Seiko 6141-290
• Seiko 6358-612
• Seiko 7160-910
• Seiko 6360-966
• Seiko 6249-528
• Seiko 6685-344
• Seiko 5289-177
• Seiko 3826-778
• Seiko 6162-288