Just a short note as I am overloaded with work:
the SOS bulletin existed as a paper edition, and was the one sent to Kew to validate trantuanii ( like henryanum in its time. SOS bulletin was planned to be published on the long term, but some participants disagreed, dropped, wanted to take the control.. normal story. The paper edition was and is the original one.
As for the history of that plant, Tran Tuan Anh showed to me some HUNDREDS wild collected plants, I know since from which area. They were all identical, with spots on the dorsal, and maybe resulting from a hybrid swamp of henryanum and coccineum originally, but all fresh from the wild. In fact he ordered a batch from the collector of coccineum (some dozen kilograms of plants) in low spike/bloom for a customer, and ended up with that new species/variety/natural hybrid colony.
He sold those a premium price after having divided every clump in single growth, so that nearly no plant from the original collection survive.
I have to say too that the plants I have have flower that are way, way bigger than henryanum or coccineum when they bloom, usually in the 12 to 14cm as a minumum. (that's when they bloom, apparently a growth matures slower than henryanum.).
During a trip to the minorities with two foreigners 2 years ago, we took more picture of a few left plants ( less than 5 so far). Tran Tuan Anh was not on that trip at all.
Afterwards, he tried to sell coccineum, henryanum and other things under that name. But the original plants of trantuanii are nearly all gone.
helenae delicatulum, same story, there has been a colony, now wiped out, close to Yen Bai, very far from the original helenae colony. Few plants are still alive today. But apparently there is one collector who still can get it, though it remains to be seen in bloom.