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I did find out that it was roughly 1970 when it first appeared, and by the mid 70s it remained modestly popular

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Features: Featherweight draw calibrated perfectly for smoking restraint goals Minimal nicotine content delivered without chemical compensation or additives Ultra-smooth filtration engineering system included for comfort Designed specifically for occasional and social smoking situations Lowest possible intensity available in Canadian Classic strength family Canadian Classic Ultra Blue targets smokers operating at the absolute floor of the strength spectrumpeople who smoke occasionally, socially, or who are actively working to reduce their daily intake

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