Seiko Cal. 3864 - 647

The Seiko 3864-647 represents an important milestone in Seiko's 1973 lineup. Powered by the 3864 caliber with 22j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-96570c264db3]

Also known as: Sportsmatic, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

14.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Silver

Jewels

22j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1973

Related Models

• Seiko 7112-893
• Seiko 7129-714
• Seiko 6145-908
• Seiko 7098-877
• Seiko 0767-985
• Seiko 7071-104
• Seiko 3859-477
• Seiko 3842-105
• Seiko 6188-486
• Seiko 3895-715
• Seiko 5295-105
• Seiko 7095-336