These sets were produced in the mid 1970s by Franklin Mint. There is a total of about 90 grams of sterling. Case is in excellent condition. There are 63 ingots, not 64.
I do not know which one is missing. There is NO PAPERWORK with this lot, just the 63 sterling flag ingots and the display case. There is some writing on the felt on the case bottom.
I do the best I can to honestly describe what I sell. I will be happy to answer questions to the best of my ability.