Seiko Cal. 6690 - 311

Seiko 6690-311

The 6690-311 is a sought-after Solar piece from Seiko's golden era. Powered by the 6690 caliber with 29j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-4a12d22d36e9]

Also known as: Turtle, Monster

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
35mm
Case Thickness
12.8mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
100m
Dial Color
White
Jewels
29j
Frequency
28,800 bph
Power Reserve
40 hours
Year
1969

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