"Solingen" tang stamp is 100% German components and assembly. Usually limited to the "Tree Brand" line.
The "Boker Plus" line, from what I've seen are produced elsewhere, including, but not limited to, China.
The "Boker Magnum" line are allegedly all China sourced components and assembled.
Don't trust the steel claims on the Plus and Magnum lines. At best 440A. 440C is a lie. This includes what the original package claims.
Both my Boker Plus and Magnum claimed 440C on the packaging. "440A" is etched on the blades of all three.
Don't expect customer service. I asked Boker a question via the Boker manufacturer's forum, and by email, over two years ago. I am still waiting for Boker to answer.
I'll never buy another Boker, based on that. If they can't bother to answer a customer's question, which costs them nothing, why should I expect. them to stand behind the product if there is a warranty issue, which will cost them money (parts and labor or a replacement knife) to correct?