I have several 410 shotshells that measure approximately 1.86-inches OAL with a roll crimp and am assuming these are probably designated as 2-inch.
The headstamps are REM-UMC 410 MADE IN USA. The shells are green-ribbed paper and say KLEANBORE and MADE IN U. S. A. The shot card or top wad says 5 nc C, which I assume means #5 chilled shot.
Does anybody know the time spam when REM-UMC made these or anything else about them?