Hello:
Sorry but I do not know about the current ownership of ORREFORS but I assure you from a historic prospective
almost all Orrefors was signed signed with Orrefors or Oplus additional information.
If not signed, we are talking about seconds at least from a historic context.
By the way, there are available many stickers from Orrefors and the application on certain pieces can not mean anything.
Billl Geary