If it's a Volpe it's been seriously reworked. They came stock with derailleur hangers, forward opening short dropouts, brake cable tunnels and cable stops - and especially cantilever bosses. It's conceivable someone removed all those things and replaced the dropouts with track ends - but that would be a lot of work.
As I compare it to photos of Volpes from '88 and '89, I note the seat stay caps are different - maybe someone replaced the rear triangle on one? That would handle any rear spacing issues and track ends all at once.