Fleischmann - 811301-B - Passenger Car, UIC, Type X - FS (Ferrovie dello Stato Italiane) - 51 83 31-70 924-7

Model Information: This generic body style comprises 1^st class (A), 2^nd class (B), mixed 1^st/2^nd class (AB) or restaurant (WR) cars of type UIC-X (formerly Deutsche Bundesbahn type m or type üm), used by several continental European railroads. Covers Epoch III to V.
Can be equipped with internal lighting ref. 9447 or 944701

Prototype History: The UIC (Union International des Chemins de fer) type X is a type of passenger car defined in 1961 by UIC bulletin 567, together with UIC type Y. They have been standardized based on the design introduced after WWII by the Deutsche Bundesbahn (DB) for its express cars, that was known as üm-Wagen or m-Wagen. The length of the UIC-X cars was the longest of all passenger cars built until then; this length has been kept identical for the UIC-Z type introduced in the 1970's.
Several thousands of these cars have been built for the major western European railways: Germany (DB), Italy (FS), Spain (RENFE), Switzerland (SBB-CFF-FFS), Austria (ÖBB)

• Deutsche Bundesbahn (DB) : a total of 6,145 UIC-X cars in 3 series (53, 61, 63) of various types - Am (1st class), ABm (1st/2nd class), Bm (2nd class), Bcm (sleeper), BDms (Baggage), ARm (1st class diner) et BRbumh (2nd class diner/bar)
• Ferrovie dello Stato (FS): a total of 4,746 UIC-X cars in 7 series (64, 66-68, 68, 70, 75, 79-82) of various types - A (1st class), AB (1st/2nd class), B (2nd class), Bc (sleeper), AcBc (sleeper). And also ...
• 163 Railway Post office cars: UIz Type 1964 (20), UIz Type 1968 (30), UMIz Type 1970 (33), UMIz Type 1976 (80)
• 317 Baggage cars: Dz UIC-X 1968 (60), Dz UIC-X 1970 (77), Dz–D UIC-X 1975 & 1982 (93), nD UIC-X 1987 (80), D UIC-X 1982 GC (7)
• Spanish Railways (RENFE) - Serie 8000: a total of 883 UIC-X cars built between 1961 and 1973, of various types: 121 AA or A10r-8000 (1st class), 6 AAB or A5B5-8000 (1st/2nd class), 15 BB or B10r-8000 (2nd class), 445 BB or B12r-8500 (2nd class), 117 BBL or Bc10r-8100 (sleeper), 8 RRR or R8-8000 (diner), 90 DD or D8-8000 (Baggage), 62 DDT (Baggage), 25 DDET (Baggage/RPO)
• Federal Swiss Railways (SBB-CFF-FFS) : 40 Am (1st class), 20 ABm (1st/2nd class), 320 Bm (2nd class), 50 Bcm (sleeper), 10 WRm (diner), 20 Dms (Baggage)
• Austrian Railways (ÖBB): 90 Bcmz (sleeper, derived from the Swiss type)

With a standard length of 26.40 m (86' 7-3/8"), they are qualified for a maximum speed ranging from 140 to 200 km/h.

From Wikipedia (in French)

See also these detailed articles (in Italian) for more information about both the prototypes and the N scale models: UIC-X.

Road Name History: Ferrovie dello Stato Italiane S.p.A. (reporting marks: FS), previously Ferrovie dello Stato, is a state-owned holding company that manages infrastructure and services on the Italian rail network (English: Italian State Railways).
Ferrovie dello Stato was founded in 1905, and marked an important milestone in the process of the unification of Italy.
In 2000, to comply with European regulations, the company's two main divisions, service and infrastructure, were separated and two different independent companies were created: Trenitalia, responsible for transport service, and Rete Ferroviaria Italiana (RFI), responsible for the management of the rail infrastructure. Both companies were still subsidiaries of Ferrovie dello Stato Holding SpA.
In 2017, Ferrovie dello Stato Italiane acquired 100% of TrainOSE, the Greek national railways.

Read more on the company's historical timeline.

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