Seiko Cal. 6647 - 528

The 6647-528 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6647 caliber with 30j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-175e8ca8696b]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Black

Jewels

30j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1989

Related Models

• Seiko 7011-385
• Seiko 6345-301
• Seiko 4513-919
• Seiko 6142-279
• Seiko 0778-666
• Seiko 3862-536
• Seiko 4422-169
• Seiko 6264-143
• Seiko 6348-344
• Seiko 5668-243
• Seiko 6328-364
• Seiko 4437-657