Barella, Teschner/Collath, Haeteg, Leue, Miller & Greiß, Stiegele(?), and many others made centerfire doubles either based on the Von Dreyse's needlefire or converted needlefire. He worked a stint in Pauli's(Lefaucheux's??) shop for a time before returning to Germany. There's nothing slack about it but the wood is rather plain and doesn't have the adornment seen on those examples supplied/sold to the courts. The triggerguard bow, buffalo horn buttplate & sculpted buffalo horn for the pistol grip may indicate it was from the 1880 or 1890s. If from the 1890s there should be proofmarks on the flats. Also is the word "Papp" anywhere on the example and does the tube set move forward and up when the front lever is rotated? Or does the tubes set swing side to side? For now I don't think it is a needfire but a centralfire or converted needlefire. Sometimes when there are 3 initials present, the first 2 stand for the craftsman and the last for the town where his shop was. But then again the craftsmen had 3 sometimes 4 names and it could be all their initials. "CFW" sort of rings a bell but nothing definite. There was a C. Wackeß of Suhl but I don't know his middle initial. My 1st guess was that it was made in Suhl but marks could prove otherwise.
Kind Regards,
Raimey
rse