Seiko Cal. 6647 - 742

The Seiko 6647-742 represents an important milestone in Seiko's 1979 lineup. It features a Champagne dial protected by a Acrylic crystal and offers 150m of water resistance. [seikata-wm-8ead571d8f73]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

150m

Dial Color

Champagne

Jewels

30j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1979

Related Models

• Seiko 0772-354
• Seiko 0774-479
• Seiko 7112-903
• Seiko 4589-539
• Seiko 7130-546
• Seiko 6115-429
• Seiko 3886-561
• Seiko 5236-408
• Seiko 6372-193
• Seiko 4539-350
• Seiko 5245-634
• Seiko 7072-652