Others have written the same but I will add my observations and experiences to the good…..There is NO a comparison between the free wheels made today and the good ones from when they were a current product. It is well worth looking for something older and of quality. My favorites for high quality were the Maillard 700 and it’s successor branded as Sachs and the Regina CX /CXS which became the America model. On the Maillard 700, you can even flip most of the cogs likely to wear and get a whole second life from them. Once you have a quality freewheel(s) change the chain very early in the wear cycle as it is replaceable, but doing so will greatly extend the life of the freewheel cogs. Treat them as an irreplaceable asset, because they nearly are. I love freewheels for some strange reason. A couple of years ago, I was lucky enough to come across the pictured Maillard 700 6 speed kit that allowed you to assemble a freewheel in a number of configurations. Fun stuff.