Seiko Cal. 6691 - 720

Seiko 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

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