I am a novice technician learning the trade and am an Associate member of the Phoenix Chapter of PTG. I am learning by working on my own pianos and friends' pianos. One friend has an old upright that really intrigues me. I have been unable to find a manufacturer's name on it so far, but I have found a serial number (8460, FWIW) stamped on the fall board and painted on the pin block, which is open-faced. The piano itself is of somewhat basic yet sturdy design; the pin block is in fairly good shape and has painted designs on it. It has two-string unisons until it gets up into the higher end of the treble section. The keys (which are not original) are one-piece; their fronts are smooth. Structurally the piano is in good shape and the owner would like to preserve it. I am more than willing to take it on, since I have a "thing" for old uprights, but I am wondering if anyone can point me toward some reference materials or if anyone has some knowledge that might point me toward a manufacturer's name. Any help would be appreciated!