...in the same exalted league as the only Yankee sidelock, LC Smith.
J.K.B. von Falkenhorst
This made my morning. "The only Yankee sidelock."
Offering you a gentile 'out'...maybe you meant...'the best known sidelock?'
In QUANTITY, Crescent and Folsom made more. Way more.
In QUALITY, Sneider and Baker's finest were at LEAST as good.
There are others, but that will get you started.
As a side note: Ithaca made some nice guns. Definitely solid, well built, reliable designs, with a small percentage being high grade and excellently done. But the fact remains, they sold more double guns pimping the name of an even more famous gun maker, than they did using their own.