Seiko Cal. 6691 - 720

The 6691-720 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6691 caliber with 17j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-4c17fb5b3f17]

Also known as: Baby Tuna

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

8.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1978

Related Models

• Seiko 7037-596
• Seiko 4582-933
• Seiko 6216-899
• Seiko 4587-582
• Seiko 4415-235
• Seiko 0769-467
• Seiko 7145-811
• Seiko 6684-570
• Seiko 6345-517
• Seiko 5650-390
• Seiko 6319-412
• Seiko 4592-297