I bought new 2.75x19 Cheng Shin tyres for use on both a 1930 Radco and a 1930 Excelsior. They are fine, and much better than old stock tyres that may have plenty of tread but have hardened over the years. A friend has a 1950 Ambassador with old stock tyres and although the old tyres looked good, with plenty of tread we soon found out their performance didn't live up to their looks.
The Cheng Shin are very satisfactory.
Cheers, Bob