Yeah, Henrich Barella had humble beginnings in Soest in 1819, where Henri Pieper was born in 1840, and Henrich Barella made his last file stroke in 1893. As noted above, H. Barella hung out his gunmaking shingle in 1844 in Magdeburg(some notes of 1844 & 1848 openings....) and had a Berlin storefront in 1860. Other outlets /satellite stores were opened in the 1920s in Frankfurt/Main & Königsberg with Emil Adam @ the helm. There were several names along the way & possible a couple generations of Heinrich Barella. Max Barella, nephew August Barella and others were under the banner "H. Barella - Preußischer Hofbüchsenmacher". H. Barella had a solid line to Bernhard Merkkel so I would say that H. Barella sourced the subject platform in some state of completion and finished it. With the tube steel Röchling, it seems odd for the moment.
Igor's website registration is free; more than likely just a filter to keep the Bots & Spiders out.....
Hochachtungsvoll
Raimey
rse