Does anyone know this makers mark?

[Two Socks]

Today I made a start on polishing up the adze I found on a carbootsale some weeks ago. (http://www.bushcraftuk.com/forum/showthread.php?t=106989)
After a bit of work with a wirebrush a makers-mark popped up on the inside of the blade. I have given it my best googling-attempts, but I cannot find anything about the maker. Does any of you know who belongs to this mark?

I can make out that it says OHMULLER & SOHN, and three dots next to it. There might be another charactar in front of OHMULLER, but I am not sure about it. Sorry for the picture-quality. I am afraid I can`t get a better one with my phone.

Any help is appreciated, as I`d like to learn more about this tool

Thanks in advance.

 

[Goatboy]

Could it be these chaps? http://www.mueller-hammerwerk.at/hammerwerk/index2_en.html they spell it Muller on company site.

 

[ex-member BareThrills]

http://www.youtube.com/watch?v=dW0PV5IxJe4&feature=youtu.be

GB beat me to it

 

[Goatboy]

By a custard skin Mr Thrills

 

[Two Socks]

Thanks guys, it could be them indeed. Difficult to tell how old it is I`m afraid?