I always wondered what casino they came from. They have the same box as any casino card (Date Used:In:Out:Pit:Table:Comments) The cards when I bought them 5 years ago seems all ready aged as the bottom of the box is unglued in most cases.

It is a most unusual back, a cobra. Any ID would be helpful although I do not think I will ever find out. Very unusaul there is no name and such a design on a casino quality card (Gemaco Alpha Series).