I did some research and it looks like they used to make counterfeits, but have since moved to cloning designs without logos. Pretty much everything says they are well made, but I just can't trust an otf with no warranty. Too many moving parts and points of possible failure to be worth the risk. That said, it looks like if you get a Microtech you may get warranty service at some point... I would just recommend a different otf really. Benchmade has great ones and their warranty is top notch, Protech makes a few, and there are a handful of smaller companies popping up now (but only time will tell if they last long enough to keep a warranty).
I did see a video of the internals of a Vespa, and it was pretty impressive how much detail is put into the machining. Sadly with no warranty and a suspiciously low price you have no way of telling how the quality of those machined parts are, it could be really well done garbage.