Proof coinage
（重定向自Proof coin）
![2002 Lincoln cent, obverse, proof with cameo](/Images/godic/202502/04/United_States_penny,_obverse,_20020531.png")
Proof coinage means special early samples of a coin issue, historically made for checking the dies and for archival purposes, but nowadays often struck in greater numbers specially for coin collectors (numismatists). Nearly all countries have issued proof coinage.