The closest remover type to that I know about is the old Sun Tour 2-prong but I can't tell if the diameter and notch width are a match. Take it to an older bike shop and have them try-fit one. As mentioned above, those pinholes are to remove the outer ring for disassembly, not removal of the entire freewheel.

Destructive removal can be done by using the pinholes to unthread that ring (it may be left-hand threaded), pulling the cog and outer body and bearings off the stationary core and using a pipe wrench on the core to unthread it. All of that is followed by buying a new freewheel.