This is a really nice compact form of sanderianum! I second (or third) the appreciation of the petal twists.
Is that pure sand the Incharm x Shin-Yi? Yours is the only one I've seen of that cross but back in early 2000s there was high expectations of this cross. It was my first flask purchase but the plants disappeared when I finished school and relocated to a different island.
(Edit: re-reading my post made me realize it sounded I was suggesting robbery which was far from what I meant. I meant that I just haven't seen other owners of this cross post pictures)
Shin Yi Sanders is a hybrid (my first photo), It is Mk x sanderianum. I bought it (a small seedling)from Vintage Orchids, CA. back in 2008(?) The owner was a back-yard breeder but I am not sure if he made this particular cross.
Post #2 is of my pure sanderianum species, It was from a Taiwanese breeder and I bought it from Park Side Orchids, PA. back in 2006/2007(a tiny seedling, straight out of the flask). I posted it here just for comparison (to the hybrid). I don't remember the clonal names of the parents(I can look at the tag tomorrow if it is important), but for sure it is not "Incharm" x "Shin Yi"
Neither of them is very big. The LS of my sanderianum is not more than 28 inches and the LS of the hybrid is about 22 inches.