Here is a most interesting collectible: a 6-8 volt magnetic utility auto light. This item was purchased, and  mailed to my sister-in-law's father back in the day.  The container it shipped in is in very nice condition.  Even the original stamps are still intact. The tin cap screws onto threads pressed onto the container's cardboard sides.  Postage at the time was only $2.20.  It's a nice conversation piece to have on the shelf in your office.