If not silver, i would guess that it is very heavily silver-plated pewter.
There are dings and scratches all over this piece, it has been polished half to death, and the only thing that remains under all of these dings and scratches is a shiny reflective metal.
The metal is quite malleable as well. You could easily crush this bowl with your bare hands, even though the walls of it are quite thick.
I just hope it's not lead I have been rubbing and playing with for the past few hours :P I doubt it though, because the piece only weighs 18 ounces.
Here is a closeup of the hallmarks:

That looks like a soldier with a helmet on, a small i and a large T, and a deer with horns to me.
6175 underneath the marks as well.
The typography on the 6175 leads me to believe it was made within the past 100 years.
That deer on my hallmark looks incredibly similar to the current czech silver hallmarks:

If it is czech though, why are there no numbers beside the deer's head?
Does anyone know where I can find historical czech marks?
Here is a shot of the bowl itself.

Thanks for reading!