Seiko Cal. 3863 - 715

The Seiko 3863-715 represents an important milestone in Seiko's 1979 lineup. Powered by the 3863 caliber with 17j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-ef8db77b81c6]

Also known as: Sumo, Helmet

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1979

Related Models

• Seiko 6353-237
• Seiko 7058-648
• Seiko 5266-143
• Seiko 4535-464
• Seiko 7115-428
• Seiko 6256-175
• Seiko 5614-607
• Seiko 7196-216
• Seiko 7037-276
• Seiko 6333-609
• Seiko 4561-662
• Seiko 5233-240