My first inclination is that it is NOT an original, but a copy (the height of the cut on the driver side and the angle of the "support" braces on the back of the saddle). That's not to say that they were all cut the same, though. The crappy welds are consistent with an original, however. Look at my pics of the known original.
Yeah. It does have the same crappy welds. I have seen similar k frames claiming to be dc units that looked similar. It will be going up for sale as I am not going to use it.
