Fantastic on all fronts! Because I have been highly focused on the Oncidium Alliance in the past year, I wanted to simply commend you on your success! I was very excited when I had my first orchid bloom from a mature growth too, which elsewhere I have identified it as Rhyncholaelia digbyana.
My first Oncidiinae, moreover, to bloom in terms of going from a mature growth to a spray of flowers was Aliceara Sunday’s Best ‘Muffin’ AM/AOS. This orchid bloomed this late Summer, which now surprises me. The plant itself grows like a "weed" for me, as is said of a vigorous, robust plant Now it needs desperately to be divided into four divisions at least, if not more. I have been somewhat reluctant because it is still outside where recently the temperatures have been cool. When I bring it in, I will divide it.
The more I study the Oncidium Alliance the more I become surprised by it! Aliceara is stated to be in many places online and in various references to be "tolerate" of just intermediate temperatures. In the Summer here in Virginia Beach, VA, USA; the growing conditions are warm to hot. I purchased Aliceara Sunday’s Best ‘Muffin’ AM/AOS when I did not know that much--not that I do now--about the various members of the Oncidium Alliance. Currently I would have stayed away from Aliceara, because it is suggested that it grows only in these intermediate conditions. Interestingly, however, this particular Aliceara Sunday’s Best ‘Muffin’ AM/AOS bloomed in late August to early September, when still growing conditions during the daytime reached into or around 90 degrees F or 32 degrees C.
Originally I purchased it in early March in the full array of bloom. Overall I am quite pleased with it. It would seem that Aliceara should be able to tolerate of a bit more warmer conditions, which in my case this particular Oncidiinae did, because Aliceara is a cross of Brassia x Miltonia x Oncidium. Miltonia in this trigeneric cross is the only cool to intermediate growing plant. At any rate, I will likely try another Aliceara just for kicks.
Your Oncidiinae looks to be quite beautiful and healthy. Also it seems familiar to me. Any chance it is Beallara Peggy Ruth Carpenter 'Jem' HCC/AOS. . . . ? Your plant has a little more spotting, or blotches than the Beallara I am familiar with currently, so I am still unsure. They do, however, carry a striking resemblance. (See the Image below.)
In any case, I congratulate you on your success! Keep up the good work. Color is returning!