This coin has been certified by National Numismatic Certification (NNC) as PR-70 DCAM (Proof-70 Deep Cameo) The one pound coin was first introduced in April 1983. Made of solid 0.925 sterling silver, it is a "Piedfort" coin meaning it was struck on a thicker than normal planchet. There was only 10,000 of these Piedfort silver proof coins were released by the Royal Mint. PR-70 DCAM indicates a perfect proof coin with deep cameo contrast. Certification #2342525 $110 B/O