U.S. Double Mint Set Certification

What We Do

We are an independent U.S. proof and mint set verification service. We assure dealers and collectors alike that all sets stickered by OSV are indeed authentic and original.   
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Why Certify and Collect Double Mint Sets?

  • Preservation
  • Value
  • Salability
  • Registry Competition
  • Originality Confirmation
  • Varieties and Errors
  • High Eye Appeal
  • Handling & Viewing Made Easy
The OSV Stickers
What does the black OSV Sticker mean?
Many sets in today’s marketplace have had one or more coins removed and replaced, thus making the sets less valuable. The regular black lettered sticker attests to the fact that each board is indeed original and guaranteed as such by OSV.
What does the blue OSV Sticker mean?
This sticker attests to the exceptional overall beauty of the board relative to other boards of that same date and mint. These boards are the finest in eye appeal for the date.
Double Mint Sets - History
The story of Double Mint Sets is fascinating. The Treasury did not, all of a sudden, decide to start issuing sets for collectors in 1947. In reality, too many dealers in the late 30's were ordering rolls for store stock. As a result, the Treasury announced they would limit orders to "two of each denomination from each mint".

As early as 1942 we know the Treasury issued these sets by the hundreds to collectors around the country in canvas bags.

By 1946 orders were into the thousands and the Treasury had to find a new way to package and mail the coins. Thus, the Double Mint Set as we know it today, was born. Issued from 1947 through 1958 these sets were housed in cardboard holders with overlaying paper flaps. Continue Reading
OSV on Coinweek

Watch OSV verifier, Leo Freese, talk about double mint sets and outline how Original Set Verification, LLP. can benefit the collector.

OSV - Original Set Verification
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