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The Hunharian telephone network was the Hungarian Mail's own one. We called them for the mail's wires, and the mail's poles.
The Hungarian State Railways (MÁV) and near the river dams were used similar construction which was used by the mail.
The Insulators's numbers are from the mails's name: Hungarian Mail: "Magyar Posta" :MP-1, MP-2 and MP-3, these are the globe-head Insulators only.
The transposition insulator is: MPK Insulator in only one size. The MPK means: "Magyar Posta Keresztezési" : Hugarian Mail Transposition. This 2 types are the telephone Insulators here only.
The other Insulators were made for the telegraph lines. There used 5 mm steel wires, it were heavy to holds. Lot of Insularor were manufactured for it, and they were needless, because the telephone lines were better, and it didn't need the heavy steel wire. Bronze wires were used.
Lot of Insulators remained, ant they were built in the telephone lines. I don't know their number.
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