Hi Bernhard, I've actually just ordered one and cannot wait for the plant to arrive...
Helvetia is the primary cross chamberlainianum x philippinense, so I guess it would be similar to other cochlopetalum x philippinense crosses. I have a Paph Honey in flower at the moment with two flowers open but your plant seems to have way more than that... about five flowers on two spikes, is it?
If you could, it would be greatly appreciated if you could enlarge the photo so we can get a clearer picture of your plant.
cheers
tim