HD
Believe it or not...........................
You are about to see those old BA 75's flown by the same 'Freight Dogs' as brand spanking new 76's hot off the factory floor. 25 years apart and still a common type rating, just differences course. Good ole Mr Boeing, I swear I must be getting old, some of the FO's look younger than the 75's.
Other common types I have worked with,
B733/4/5/6/7/8, i.e. classic v NG (not sure if they still are with the CAA)
CRJ200/700, they were a nightmare with 4 pilot fleets between the two types on a common type rating!
regards,
Bored