Replace Regina valve with Presta
Reginas and Prestas are really close in size, they can easily be interchanged. If you do find that it rattles in the larger hole on mixed surfaces, you can always use the threaded Presta nut, just don't crank it down too much. The Regina valve also has a metal seat, so before using the Presta, I would get a bit of emery cloth and make sure that there are no burrs on the inside of the valve hole - Presta tubes have a double rubber seat, so they are more fragile.