On April 12, 2024, the Hungarian Post Office validated a postal issue dedicated to "Anniversaries of Railway History in 2024".

The Hungarian Post Office is celebrating two anniversaries of its railway history in 2024 with the issuance of a commemorative miniature sheet. One is of the Sváb Hill Cogwheel Railway and the other of the steam engine model no. 424.

The Sváb Hill Cogwheel Railway is 150 years old, and the production of the steam engine model no. 424 began 100 years ago. Twenty thousand copies of the commemorative miniature sheet of four stamps, designed by graphic artist Imre Benedek, were printed by the printing company Pénzjegynyomda Zrt.

The system, route and trains of the Sváb Hill Cogwheel Railway are an important part of the history of Hungarian transport. The railway has a special rack or rail track placed between the rails of a normal track, allowing trains to overcome steep gradients. The gears mounted on the locomotive engage the rail, propelling the train up and down. The first steam train ran on the Sváb Hill Cog Railway on June 24, 1874. The construction was entrusted to the Swiss-born engineer Ferenc Cathry Szaléz, and under his leadership the tracks and stations of the cog railway were built in less than a year. The passenger traffic of the Sváb Hill Cog Railway grew steadily over the decades and at the beginning of the 20th century it needed modernization. The railway was electrified and began carrying passengers on June 2, 1929.

Today, the only cog railway in Budapest operates in District XII, running between the Városmajor and Széchenyi Hill stations. The steam engine type 424 (nicknamed "Buffalo" or "Nurmi" after the famous Finnish long-distance runner) is one of the most successful Hungarian locomotive series. The Hungarian Royal State Iron, Steel and Machine Works (MÁVAG) built 514 of these engines between 1924 and 1958, 365 of them for the Hungarian State Railways (MÁV). Work on the design of these locomotives, ordered by MÁV, began during World War I. The steam engine type 424, the pride of Hungarian industry in the interwar period, also left its mark on Hungarian culture, appearing in literature, films and even pop music. The locomotive type 424 was in regular service in Hungary until the end of the steam era in 1985, but today only two are in working order. Some surviving 424 engines are on display, either in the temporary exhibition of the Hungarian Museum of Science, Technology and Transport or permanently on Kőbánya Road in Budapest or at the railway stations in Dombóvár, Nagykanizsa, Tokaj and Szolnok. Model 424 steam engines and steam and electrified locomotives of the Sváb Hill Cog Railway appear on the stamps and in the frame of the commemorative miniature sheet. The image of the first day cover includes a graphic composition of the technical drawing of the 424. The special postage stamp on the first day cover is a stylized drawing of a 19-tooth gear.