Here you go!
real and fake Bottema forks together.
The locking ring slot on the stem is milled on the fakes. The Originals are cut with a cuttoff wheel.
The stemtube is not reineforced like the Skatepark models. The dropouts are very similar, but not exact. They are thicker (not by much)
Every fork is stamped on the stemtube. The ends are capped as are the Skatepark models. I think the early forks are not capped. I'm not 100% on this though.
Pics