Vintage 1950's Atlas Master Glass Dome Gumball Machine Penny/Nickle with Key

HARDER TO FIND VENDING MACHINE AS IT TAKES BOTH PENNY FOR SINGLE GUMBALL OR NICKLE FOR A FEW GUMBALLS. I HAVE HAD THIS UNIT FOR SEVERAL YEARS. I PUT A FRESH STICKER ON GLASS, KEY NOT ORIGINAL.

TWO PATENTS EMBOSSED ON IT #2846122 AND #2784827.