Hi Eric, I am also convinced this is not a pure equestris. As I said in my first entry, the shape is better than standard equestris, and in general too different for my taste. Additionaly, as you said, the margins of the petalss is a bit denticulated, which is typical pf hybrids of two plants not 100% genetically compatible...
However, this mericlone is sold as Paph. equestris 'Orange' both in the USA and Europe. I do not know where it originally comes from...
I will give it a chance, for a second or third blooming, and see if it improves... if not, will get kicked out of my collection...