Well, I don't think I found the correct tag with the other serial number, but I did take some photos of what I have found. So, it has Monarch hydraulics, and the wiring schematic says it has downpressure. It's supposed to warm up tomorrow, so I'll try looking again. I was trying to check things out without wearing gloves due to issues with grip and my hands got too cold to keep looking. Didn't help that everything is still partially covered in snow from last night. But, from what I've found so far, when I find that last serial tag, I'm willing to venture a guess that the serial will start with something like "29D". When I get it unloaded off of the trailer, I think I might want to go through checking all of the wires around the hydraulics, making sure they're all in good shape and properly connected.