It is P. Oriental lawrence x Clair de Lune (I could find at least 6 parents but it is a really long list of hybridations..., including P.maudiae, curtisii, lawrenceanum, )
I got it recently with one flower and the other bud was just coming out. I love the delicate white and green stripes and the mottled leaves (not on the picture)
Thanks for the name Stephane....it's on my paph wish list now!