Seiko Cal. 5647 - 764

The 5647-764 is a sought-after Solar piece from Seiko's golden era. Powered by the 5647 caliber with 35j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-af06ce7f7ec2]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

43mm

Case Thickness

15.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1971

Related Models

• Seiko 7050-143
• Seiko 7084-612
• Seiko 5246-700
• Seiko 5277-765
• Seiko 6644-658
• Seiko 6279-937
• Seiko 6311-983
• Seiko 6355-493
• Seiko 6152-883
• Seiko 6246-277
• Seiko 6661-381
• Seiko 4570-343