As far as I know its real.
Here are the known CIC counterfits.
Osborn counterfits known in 2002. Total 29

Bingo Palace - 100 N1363
Castaways - 100 N0874 & N1444; 500 N1445; Sports Book Oversized
500 N1436; 1000 N1437
Holiday International - 25 N6139; 100 N1056; 500 N1054
Park Tahoe - 100 N5448; 500 N5449
Rendezvous - 100 V6844
Sahara Tahoe - 100 N5513; 500 N5514; 1000 N5511
Silver Bird - 100 N0877, N9081; 500 N0870; 1000 N0869
The Treasury - 100 N2264
Marina, Las Vegas N7167 $25; N1284 $100; N7168 $500
Del Webb's Mint, Las Vegas N7173 $100; N7174 $500

Eddie's Fab 50's, Reno N7126 $100; N7127 $500-Paul-Son Chips.