The listing, Vintage W.C. Fields Battery Tester Works! 1974 has ended.
I did test this, it does work! Shows "1974 American Noveltronics Corporation" on the label. "W.C. Fields Red Nose Battery Tester" - his nose lights up when the battery has life left in it. There is a little discoloration of his coat, but in great condition for the age and IT WORKS! (Sorry, but that was exciting to me lol).