1987 Proof Set U. S. Mint 20 Sets San Francisco Mint with Box and COA Closeout 15 July 2024July 15, 2024adminproofcloseout, francisco, mint, proof, sets 1987 Proof Set U. Mint 20 Sets San Francisco Mint with Box and COA Closeout. 1987 5 coin Proof Set (20 sets).