Thanks to all...
this is indeed a first time bloom seedling, which was very stressed by the time I received it. It took a time to recover and look better. As I said, I am very happy with the first bloom, and am looking forward to seing how it improves within the next years
P.S.- I think the former owner could not take care of his collection anymore, and his son/daughter asked a nursery to sell the plants. Most of them were extremelly dehydrated and/or had not been repotted for a long time. I bought 4 different plants from this collection (a whole sale package), but this Laelia is the only one which survived. The yall went through Sphag&Bag, rooting hormones and so on... but...