I'm having difficulty identifying the registration of two Embraer EMB-120's belonging to Continental Express. I cannot see a registration number and there is no numbers on the nose gear door (which is the last 3 digital of the reg). There is however another number on the fuselage near the tail. It looks like a fleet number. The two aircraft I cannot identify have numbers of 273 and 297. I can't find anything that lists Continental's internal fleet numbers including the JP book.
Anyone know what the registration of these two aircraft are? Out of curiosity, why would Continental use a fleet number different than the number on the gear door?