SILCA - Manufacturers of the finest pumps and tools for bicycles
is the posh new US division started by the guy that bought out the old Italian company. It seems left the Old one in Italy.
http://www.silcapompe.it/index_en.htm
30.0 is a screw on Schrader and a threaded version of the 24.0 that has served me without much issue for 30 years.

My only issue was user errors pushing it onto the stem much further than necessary.

this piece 2220 screws on a schrader stem to use a presta pump 2220 - Silca Pompe

but as the adapter opens the S/V valve core one would have it in the P/V pump head first..