Vahe
That's a useful site. Looks like the original source of secondary material in golden years and the other UK sites.
The Germans invaded Poland on 1 Sep 1939. It seems, according to the site's author, Rob Mulder, that two weeks or so later, the Polish gov't, or what was left of it, literally gave LOT's aircraft to LARES which was the state-owned Romanian line.
SP-BGK is assigned to c/n1090 by Mulder, and later YR-LEB, and so it is in the list I sent to TIGHAR. It is useful to have what appears to be the original (I think) source. So this clears up SP-BGK.
What is still missing is any mention of SP-BGJ, and c/n1099 and c/n1100.
Thanks. Useful addition.
PS., Did you contact Mulder to ask the source of his data? If not, I will. He may be able to shed some light on 1099 and 1100.