Posted By: 
leonWell, I thought that title would jar some introspective thought.  Here's a good question. I have recently purchased another card that has an overstamp back on it. It is the E121 series with a Johnson Candy overstamp (bought from Frank-thanks).  It has the purple overstamp like so many of the other caramel/tobacco cards with overstamps of the era ie....the Old Put, Briesch, etc.....does anyone know why they mostly used the purple color?  I would guess it is because it was available and was maybe used in different food businesses....best regards all....