300
In the late 1800s, Europe,
Greeting someone by saying :"Hello, old fellow" was considered vulgar.
TRUE.
“To greet someone by saying “Hello, old fellow” indicates ill-breeding. If you are approached in this vulgar manner, it is better to give a civil reply and address the person respectfully, in which case he is quite likely to be ashamed of his own conduct.”
Source:
The 1973 Old Farmer's Almanac