This is by no way a slam against your friend, but unless they came from a government store there is a 99% chance they are fake. I am off to the Habanos cigar festival on Monday in Havana. I have seen my fair share of counterfeits. Regardless if these are a good deal or not, I have seen many friends come back from Cuba with great "deals" and almost all of them are fake. Also, Montecristo does not make a #3 in a Tube. A Monte #3 is a 42 Gauge and 5.5 inches, the Tubos are 6 inches and 42 Gauge.
Here is good site with samples of counterfeits.
2011 550xi Carbon Black/Oyster, M-Sport, Premium Package, Technology Package, Electronic Damper Control, Dynamic Drive, Comfort Access, Active Seats, Surround Cameras
2005 X5 Sterling Grey/Truffle Brown, Premium and Cold Weather Package, DICE iPod Kit, Bluetooth, DSP, Comfort seats, Invision DVD Headrests, Valentine V1 hardwired, TomTom GPS