Details on the Inscription of the Western Gate of Moria

Hi Friends,

I'm planning to make a huge badge/sticker of the western gate of moria for a door at home. So I had to redraw the whole thing... and even the inscription was no problem with the right font.

But can anyone tell me something about the three letters in the upper corner and below in the middle ?

Here is a photo composition of the sticker and the known drawing out of the book:

(Click on the pics for bigger ones)

Thanks,
Berenanu