Originally Posted by wahoonc
That means it is a Birmingham built Herc for sure. It also means parts can be hard to find
IIRC the Herc uses a threaded sprocket...where the S-A has the splined one. Aaron
Hercules parts should interchange with the SA AW. It appears that some were AW copies and others were built by SA and badged as Hercules. Threaded or splined drivers had more to do with the date of manufacture than the name on the hub. I have a Herculese threaded driver which is subtely different from the SA one but they are interchangable. The only difference is that it has just slightly more thread.