B 20-33.8 ( Regular passenger coach)

Also known as: B4ü, Unified cars I (Voitures unifiées I - VU I / Einheitswagen I - EW I), Unified type I (Type unifié I / Einheitstyp I)

UIC / EVN registration: 50 63 20-33

Registration country: Switzerland

Railway companies: BLS - Bern-Lötschberg-Simplon Railway