Quoted from roc-noc:Mr. Pinball Price Guide has a section called Chronological by Manufacturer.
That is where I found mine. Been looking for two years.
12/1952 Gottlieb - Queen of Hearts - recently purchased but not yet delivered.
12/1952 Williams - Twenty Grand - found a ratty example but passed. Still looking.
I have a twenty grand I am selling for a friend, needs work.