4 Gem 1961-64 US Mint Silver Proof Sets in Brand New Vintage Capital Holder Sets with Embedded Philadelphia Mint Marks. Also included is all original government packaging and Certifications from the original sets. These are the last 4 original US Mint Silver Proof Sets before abandoning the Gold and Silver standard beginning in 1965. At times even the nicest proof coins come directly sealed from the Mint with minor imperfections. Please examine the photos carefully.