Originally Posted by
bykemike
A common tool called a "pin wrench" is used to remove/replace that type of threaded ring,
I don't think he's referring to the pin holes in the lockring, but the Regina-like notches in the body:
They look smaller than Regina's, but perhaps a Regina or other 2-prong remover tool could be ground down to fit. The notches look too delicate to withstand the hammer & punch approach, IMO.
I wouldn't put this freewheel onto a hub until you've found a means to get it off again, otherwise destructive removal might be your only option.