Fleet data:

Built: 1961–63, 1963–65
Original numbers: 1101–1128, 1201–1236
Run in the cities: Debrecen, Miskolc, Szeged

Debrecen Szeged

Technical data: Type: CSM 1, CSM 2, CSM 3, CSM 4 Lenght: 22 630 mm Weight: 24 050 kg Body: Framework: steel Lenght: 21 747 mm Width: 2311 mm Wheel-base: A–B: 3800 mm, B–C: 6880 mm Wheel diameter: 780 mm Spring type: A9 Seats: 28 Stands (5 pers./m2): 127 Standing area: 25,43 m2 Capacity: 155 person Door: Type: double 'pleat'  Layout: 2–2–2, and 2–2–2–2–2 Operation: by compressed air Engines: Quantity: 2  Type: TR 4,5/14 Power: 58,8 kW Brakes: Normal: electric brake Additional: 4-trunk battery powered  magnetic rail-brake  Stop: compressed air-brake,  hand-brake Air-compressor: Type: CL2 Operation: by electrical motor Electrification system: 600V DC  Lights: bulbs, 600V DC Type of control: manual, direct switch

Additional data:

There is a variation with doors only on the right side and an other variation with doors on both side. There are some cars with single driver cabin and the others have 2 driver cabins.

The prototype had the number 3720, the first double-direction car had the 3722.

In Budapest the single direction cars ran until 1980, the double direction cars until 1983.