This is an odd one. Challenge #67 is a Steam Automobile by Morisue Kei. The crease pattern gives this:

And that’s as far as I went. This isn’t one of those I get annoyed at where it’s only made difficult because it’s in crease pattern. It seems like a crease pattern was the way to go, at least initially. This one needs something more to get it from the crease pattern to the finished model. Many of the lines in the finished model (like exactly where the wheels sink, the vertical and horizontal seat line locations, etc.) are not in the crease pattern and must be guessed at, meaning it’s not very consistent. It’s a good crease pattern (any more info would be a mess), but it needs something like additional diagrams to finish it.