Hi John. Well I am no expert on the Stans. but I do have a few and this one looks like a wardii hybrid to me. Unless you are sure it is a species, to me looks like a hybrid between occulata and wardii. I could of course be wrong, and am welcome to be corrected. But though it may help you along with the ID. The spots are very occulata, the colour and shape though very similar to wardii, minus the dark column foot of wardii.
Hope this helps.