griswold patty molds with recipe in original box For Sale

The molds look like they have not been used. The handles look like they have rubbed against the molds over the years. Included is the original recipe and a copy of the sales slip dated 1-13-01 from the old Pulford Opera House Antique store in Savanna, Illinois, which is no longer in business. Please look at the pictures for the condition of the items. My grandmother use to make dessert molds out of a similiar set in the 1950s, using powdered sugar sprinkled over them or with a pudding or pie filling. I do not know for certain when these molds would have been manufactured. If someone knows by looking at the box please let me know, I am curious how to tell age of patty molds.
Item comes from a pet and smoke free home. I strive for a 5-Star rating, should there be an issue with your purchase please contact me prior to leaving response. Thank you for looking.