Appears to be a C-16, but the top mounting system has been totally modified. Looks like it might've been used on a super A maybe. They did make an A-16 middle buster also I believe. Someone who knows more will probably chime in later. As far as the depth wheels, I've never seen one with the wheel still on it. Kind of leads me to believe it wasn't really needed. My grandfather's worked well without it. I finally found one, but I haven't had a chance to hook it up and use it yet. I got lucky finding mine. A local gentleman was selling a couple of cubs with different equipment mounted on them and I talked him into selling the one I have separately for $200, and it is practically new. Did I mention I got lucky? Lol. I have seen asking prices as high as $700, but $300-$350the seems about average on the few I have seen advertised. That being said, even with missing parts, even if it has been modified, if it is something you really want like I was wanting mine, the best time to buy it is when you find it. The C-16 is as hard to find as hen's teeth around here.
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