Hello everybody!
These WLABm MU sleeping cars are version 1973 without shirts unilke version 1964, former CIWL (made by Rivarossi and Arnold). In origin SBB ordered these coaches from FIAT (in CIWL livery but without CIWL logo) at the beginning to replace Z type sleeping cars on the connection Geneve - Roma, thus TEN version may be included in the composition of Expr 324/325 (with SBB UIC X and SBB Bcm type Eurofima). Actually SBB had both versions (1964 and 1973) in TEN livery but "Mond und Sterne" livery was applied only on 1973 type, thus Arnold coach is wrong in principle.
Reagarding EN Luna, FS MU WLAB "Treno Notte" should be still more recent than original version 1973, then there should be some differences with respect to these cars.
Gruss,
Roberto