Hello,
I have a reason for asking this question - and it's not ignorance !
I have a pre WW1 bicycle with a skip-tooth chainwheel, which is in good condition, but the rear freewheel's teeth are badly worn.
I have a freewheel of the same era but it has ordinary 1/2" pitch teeth - and it's in good condition. It possibly has Italian threads.
I can't find a replacemment freewheel on ebay, with skip-teeth, so I'm considering alternatives.
These include machining off the worn teeth and using a readily available skip-tooth sprocket to make a new "tooth ring", which could be brazed on to the old freewheel.
Just a talking point really - as I'm still hoping to find a suitable skip-tooth freewheel from the distant past, which would have been nickel-plated !