Three different stages of the Valmet/Tikka/Finnclassic:

Valmet 412 made in Finland
Tikka 512 made I presume in Finland (?)
Finnclassic, made in Italy by Marocchi. Now part of the Beretta Group of Companies. The model currently available.

The barrels, mounts etc should all be more or less interchangeable between the three, however some gunsmithing may be required.

Valmet Gunsmithing instructions

Marocchi Finnclassic