These are the Uppercase Z and R.
Yes, it's a Z and not a 3.

Distinguishable features:
- Decorative, archaic, strong typeface.
- Serif, but hard to see with the Z.
- The top horizontal line of the shoulder of the R runs through the stem, creating what seems to be a second serif beneath the actual serif.
- The tail of the R extends horizontally beyond the shoulder of the R.
- The Z clearly has a descender.
- The Z has a curved horizontal top.
- The middle of the Z is a sharp corner, in about a 45degree angle in the middle. On the right it's a corner that is hardly visibly blunt, immediately going into the curved descender.

These two letters are really the only ones I have.
I tried various font identifiers, both by uploading images, and by answering the series of questions. (The latter system would certainly benefit from being able to inform the identifyer of all the letters at your disposal )

I know it's very limited, but I am quite desperate here.
What might help: the ones who used this typeface is know not to make their own letters, and they tend to use free ttf's.

Morris Blackletter  Sugerida por jerseygirl 

'R' has been slightly modified

That's at least extremely close indeed. But yes, the R lacks the shoulder running through the stem.
It might be a modification, that's true. Unlikely, knowing the source, but most certainly not at all impossible.

Thanks!