If im not wrong you could transfer from all worlds to Calva and Calvera. It was the way to transfer items from optional pvp to retro etc.
Calva and Calvera are free-to-move Hardcore PvP servers. This means that you can move there from any server except the Preview Game Worlds (i.e. Optional PvP, Open PvP, and Hardcore PvP servers). It does not mean world transfer is free.
If you move your character to one of the two free-to-move game worlds, but want to transfer away again after 6 months, you can only move back to a game world of the same PvP-type as your original world or to an even more restricted PvP world than your original game world. For example: A character that was transferred to Calva or Calvera from an Optional PvP world can only move back to Optional PvP worlds, or it can be transferred to the other free-to-move game world.
These servers are subject to abuse, facilitating the transfer from Optional PvP (where gold and items are significantly more common) to Hardcore and Open PvP. The transferral of characters away from this server is restricted based on your previous game world(s), but the outbound transferral of gold is not restricted.
When you transfered to one of this worlds with items you had to make new character to transfer it to other server.
Since Oct 15, 2014, both Calva and Calvera are Retro Open PvP worlds.
Source: TibiaWiki1, TibiaWiki2