These no denomination items came in three sizes, one pound, half pound and quarter pound. They were extra prizes in a slot promotion which began in August 1995. Quarter pound was given for top jackpots on nickel machines. Half pounders for quarter and, I believe, 50 cent machines and one pounders for dollar and up. Althougn not plentiful, they exist in considerable numbers.
The Orleans ran a similar promotion in February of this year, with painted versions of Liberty Al.
I think the sizes were 2 ounce, three ounce, either four or six ounce and one pound.