Siemens produced their own tubes or they were rebadged from Lorenz-production. Or Telefunken?
I don`t think that they were made by Philips, just because I had too much trouble
with Siemens/Telefunken CRTs, but not with Philips!
Oh, they (AW 43-88) were made in East-Germany, Poland and Russia, too.
The Teslas from Prague are not better! Lousy junk, often without aluminisation, and that in 1959 and upwards.
Btw., I have an australian made Philips CRT, but has air, so its free for local pick-up.
Happy weekend,
German Dalek