Hi Mark,
I'd make a guess at it being a Helens Hybrid,the chalky film on the stem looks similar to my HH than any of my sikkis.But I'm definately no expert.
Before this year I only grew Basjoo and a couple of small sikkis,now I've got more types than I can shake a stick at.
In the last week I've managedto buy Ice cream,Velutina,Laterita and reserved a Variegated Raja Puri
The latter I've got to wait 6-8 weeks for,but well worth the wait
Steve