Check out this little Red Devil JUMBO Magic Black Snakes box, I don't think they even make these guys anymore. The box is 2 1/2 by 1 1/2 and contained just 6 snakes. My guess is these were from 1951 from the dated State Fire Marshal seal on the back. The side on the box has this great information" Guaranteed not to contain mercury ( of course they are snakes not fish). The directions are better " Be sure pellet is ignited completely for perfect results" ( So it's up to you not to screw up the snakes) and the the last tid bit of info " Do Not Hold In Hand" (Unless you want 6 little black spots on your hand for life). Thanks for dropping by.