I bought an acoustic guitar at a thrift shop today for 30 clams. I almost put it back and walked away, it was so beat-up, and with no name or identifying marks on it. Except the tuners. I checked the guitar twice because it didn't look like the average Chines chop shop axe, and that's when I saw that the tuners had 'C.F. Martin' engraved on them. Without going into the other similarities it has to Martin guitars, what else would have Martin tuners on it? I'm in a quandary. Do I have a B-grade Martin here?