Originally Posted by
Otis
... "Block chains" are a lot tougher (and more expensive). Block chains are way cooler for a period race bike. But if you are just going to ride it on the road I would go with a standard pitch 1/8" drivetrain. It will be smoother, quieter, and a lot cheaper.
Bike in question:
They don't get much more period than a 1937-8 Schwinn Paramount.

I have the chain and chainwheel, wheels, too, as you can see, but they are the original wooden rims and I don't really want to ride them.