This is a (shameless?) copy. On the left an original from TTeplice (Czechoslovakia) and on the right one (the photo I found on the Swedish Tradera) with the brand 'Deutschland'. This is in any case from before 1945, we can conclude that. Is this plagiarism, copyright infringement? If the trademark is registered, you may not just stick that trademark anywhere. That is not the case here. Is the shape registered? No, almost never. The most logical thing is to buy the mold and put your own brand on it, like here.