Back in 2001 there was a topic on the left facing Black Falcon crest on LUGNET and the topic was brought back to life in 2010 some 9 years later on Classic-Castle. Someone did manage to identify that this came from 6030 and 6074 sets.
There was also news of this inverse colour printed Black Falcon crest which i am not able to find the source anymore (Highly possible I read it off Minifig Customization Network which is now defunct.). It was not identified where this could be from. But it is mentioned that, it could be a screen printing error where the seal was apply before the sliver is printed, thus the sliver on the crest tends to wear out and fade over play.
Then TLG did the best move to re-issue 6074 Black Falcon’s Fortress as 10039, a LEGO Legend set in 2002. The Black Falcons from this Legend set came with a pointy end Black Falcon crest.
Being a castle fan and army builder, mis-prints and variants werre always good news to me, not so much for the monetary value but more for the opportunity it brings for a new fraction or simply to identify the leader. Of course back in those days, TLG had very stringent QC, hardly any deflects leaves the factory in those days.
Back in 2001 when I first read about this, I rampage through my Black Falcon collection, I only had the inverse colour print and the normal print in my collection. I started an on and off search for the left facing crest for the next decade until a fellow local collector who has a few in this possession traded me one a couple of years ago. And of course, I got the reissue print from the short run of 10039 Legend set.
Hope you have enjoyed this little bit of Black Falcon history lesson. Thank you for reading.
PS : I would guess most readers will be going through their collection to see how many variants of Black Falcons they have in their collection.