Paul Dachsel Amphora? Need some help

Hello!
Could you please be so kind to help me with this vase?
The Internet gives the following information:

Looks like an Amphora by Paul Dachsel, but I' m not sure because of these two holes and the mark looks not like I've found in Internet

 

Looks to me like someone drilled two holes in it. There are pencil marks on the side marking where the hole was to go. The finish glaze is damaged around that hole.

 

Too bad about the holes, the one on the bottom isn’t a deal breaker but the one on the side is a shame. It can be repaired but I don’t know if it would be worth the it.
The mark is a conjoined, R,ST,K Riessner Stellmacher and Kessel.

 

Thank you very much for your replies! You helped me a lot!
So pity that somebody has damaged such a beautiful vase.
It was bought for ~ 40 euros, but I suppose that the reparation would take me much more money.
I bet that the person who made these holes just for nothing didn't know that he has drilled ~ 1,5 - 2 thousand euro.

 

It was made into a lamp, which they may have used for a long time. The side hole is in a weird place, though. Put it to the wall.