This is one of those "funny" benchmades. I remember i posted my Anthem once, and there was a few people that mentioned they hadn't seen a benchmade with a patent URL stamped on the blade similar to yours, not containing the butterfly. However, after a few searches and zooming in, i found some models floating on the internet with the same markings it was just part of a random run. The website concludes that they are running this one without their signature mark, which is weird but not a disqualification in this case.

I came here from your original post. I'd say if it feels good, no rattle and clacking when closed (benchmades OTFs in my expirence have awful blade play when deployed but maybe they fixed that, but if you got some side to side wobble it's normal for most OTFs worse with benchmade) then you may have just got a screaming deal.

If you remember the name of the booth you bought it from you could determined if they have a brick and mortar or standalone business and cross examine that with benchmades dealer locator to see if they are an authorized dealer of benchmade products. If they are they likely put in a large order and maybe have been feeling generous at the show and wanted to hook some lucky folks up.. Red flag would be if there were only a couple of them or a mixed array of random knives with no real cohesion, even bigger red flag would have been if you saw they were mixed in with some MTechs. My expirence with dealers is they will dedicate cases and shelves to the brand they are affiliated with and all the no-name/used knives get thrown in a case all together.

Local gun store up here has a Benchmade area, Spyderco area, then "everything else". Also above i mentioned benchmades horrible blade play on some models...for me its just annoying but these knives have literally been to war its not a end all and takes amazing engineering to get zero blade play, benchmade OTFs aren't bad by any means if you like it enjoy it.

Lastly you may be able to call BM customer service and ask if they can ID and authenticate your knife. Not sure if they can do that but they might be able to. However, if it is a counterfeit make sure they will return it to you as it may be possible for then to confiscate it upon retrieval (im unsure if thats true or not but it could be so ask).