Basically no difference at all, just had a Hungarian serial number.Also, what were the differences between the AKM-63 (first model) and the Soviet original?
I had some errors in my previous list sorry, here it's the updated one.
AKM-63 - Original AKM style. The first 300 pcs had a plywood pistol grip, lower and upper handguard, than between 301 - 15023 pcs has steamed beech wood grip and lower and upper handguard. Looks like the later AK-63F AMM types.
From the upcoming book:
"The technical parameters of the new AKM-63 weapon were equivalent to the original Soviet model. Instead of the AK-55 one-piece milled receiver, the AKM-63 receiver made from sheet metal. The 300 pcs initial batch of AKM-63 made in 1963, were used plywood to create a pistol grip and a lower and upper handguard. However, it soon became obvious that the lightweight plywood parts could not be produced in sufficient quality by the Hungarian wood industry. Therefore, starting from the 301st piece, these plywood parts were changed to steamed beech wood. Because of this, however, the weight of the submachine gun increased, which was not acceptable by the HM. Due to weight reduction requirements, the heavy lower, upper handguard, and the pistol grip had to be changed to something else. Primarily the lower handguard was made of sheet metal, on which the forward-facing wooden pistol grip was placed. The upper handguard wood part removed so the gas tube was left bare metal. Finally, the regular AKM compensator on the barrel end was also removed. Unfortunately, it turned out that replacing the wood lower handguard with a metal sheet handguard with a wooden pistol grip due to the heavier solid wood did not significantly reduce the weight of the submachine gun. But since the lower handguard equipped with the pistol grip was not in direct contact with the barrel, it was possible to make the front and rear grips and the buttstock from plastic. All they had to do was find the right plastic, which is cheaper than wood, but just as durable."
From my collection: This weapon started his life as a training weapon "GYAK", that is the reason why it got plywood furniture which did not changed to plastic.