Just a quick update. I messed around with this a bit. The limit screws will only allow 4 of the 5 cogs on the freewheel to be functional. Otherwise everything works as it should. None the less it is a well built wheel, true and tensioned nicely after all these years. I'm fairly sure it's a period correct addition and not recent. Someone really liked this bike, its in excellent condition for a 1962 model . Thanks for all the insight and comments