Certified by a museum curator as historically significant is one of the methods to get a firearm that is not necessarily 50 years old to be accepted by the BATF as a C & R firearm.
The CZ-82 is barely more than half of the 50 year "standard"...I don't know what got them C&R status (maybe the fall of the Czechoslovakia in '93) but I sure am glad they did
07 FFL /Mosin-Nagant Custom Shop/Bent Bolts
Gun-Kote/ Cerakote Refinishing
Criterion Barrels/ Savage Re-Barreling