The South African Express Airlines has about 15 of these aircraft. They are all registered on the SA Civil Aviation Authority's register as CL60's but the description of the aircraft (on the register) varies and is sometimes
CANADAIR CL-600-2B19
and sometimes
BOMBARDIER CL600-2B19
For those that need information on South African registered aircraft the website is http://www.avdex.co.za/saregister/
(free registration) This website is fed information from the SACAA and is endorsed by them
It may be endorsed by the SACAA, but it's still wrong :-)
If it helps, Canadair/Bombardier designations and marketing names are as follows:
CL-600-1A11 (ICAO CL60) "Challenger 600"
CL-600-2A12 (ICAO CL60) "Challenger 601-1"
CL-600-2B16 (ICAO CL60) "Challenger 601-3A/-3R/604/605"
CL-600-2B19 (ICAO CRJ1/CRJ2) "Regional Jet 100/200/440/Challenger 800/850/SE"
CL-600-2C10 (ICAO CRJ7) "Regional Jet 700/701/Challenger 870"
CL-600-2D15 (ICAO CRJ9) "Regional Jet 705"
CL-600-2D24 (ICAO CRJ9) "Regional Jet 900"
CL-600-2E25 (ICAO CRJX) "Regional Jet 1000"