One post-war label definitely on my radar is Sonora, "Clear as a Bell"
(not.) I haven't seen this before; Robert L. Campbell's study,
published in June. Our own David Diehl helped out with it.
One thing: The Majestic label did fold at the end of 1947, not in early
1949. By February 1948 they were already being dissolved in the courts.
However, they did do the same thing Sonora did; stripped the record label
out of the Radio and Television interest and saved the latter.