PVC = polyvinyl chloride, the material drain pipes and shower curtains are made of.
PCV = positive crankcase ventilation, what we're talking about here.
Not sure where you got that "Novo 117A98" thing, but I assume you're talking about the '64-'69 style all-metal PCV valve with the curved outlet nipple. The originals were black and made by Stanadyne. Some aftermarket items made by other companies were silver cad plated.
NOS items are
all •
over •
eBay.