I got this as a freebie from Asendorfer the first time I ordered from them. It's labeled as a P. robinsonii (which is one of many similar appletonianum varieties), but I don't think it is one, since robinsonii is now apparently synonymous with cerveranum (still a variant of appletonianum), and the cerveranum has a very distinct staminode, which this guy lacks.
So, I don't know which variety it is, but I'm pretty certain it's an appletonianum at least.
This is a single growth premiere bloomer, which is why I cut the stem immediately after taking these pictures.
Despite me expecting another cerveranum (have one already) and this one surprising me, I really like it a lot.
I hope you do too: