Counterfit Telefunken Tube?

I recently bought 2 Telefunken tubes and after waiting in great anticipation, the tubes finally arrived. One tube is clearly labeled Telefunken (I know labels can not be trusted) and also has the trademark "diamond" shape at the bottome of the tube. The other tube's label is half rubbed off, but more importantly I am not convined there is a 'diamond' shape on the bottom of the tube. One can ALMOST make out a diamond shape, but I was under the impression the diamond should be plain as day. Is there anyone tube experts out there willing to look at some pictures and help me decide if this is a genuine Telefunken tube?

Thanks in advance.

m-