Great! They were part of my Belgrade youth. I remember Ansaldo, Alfa Romeo, Fiat and Tatra trolleybuses in service. Who knows if in city public transport company’s junkyard could be found some of those jewels.
'63 2600 Touring Spider (AR 191437, the car that started the 2000/2600 International Register, reassembly in progress)
ex-'65 2600 SZ (AR 856043, now a restomod in Austria)
Maintainer of a private 2600 SZ register (not the one in the Netherlands).