Can´t help but from preview I thought I see Wiener E1 on right. Even if PCC and Duewag GT6 are not related AFAIK

Time that you buy some books about the history of the PCC's, or come to Den Haag :-)
The best know PCC's on this website are the Tatra's T1/T2/T3/T4 and the articulated versions. Tatra bought in 1948 a PCC licence by Westinghouse.

The middle and right tram have the same, original and so typical PCC front. They were made from the orignal American PCC models and plans. The Brussels tram, constructed a couple of years later, received an own (European) design.
Now an Antwerp PCC is present and I hope to go next weekend to make some photos...

Yes I know that Tatra trams were based on PCC. I meant front part of tram where windows are falling inside, which is case of GT8 too.