Having worked for BA LHR Eurofleet before and after VS (looong story!), I noticed the Reg written on the dor frames on all the 737s, 767s, 757s and A32Xs I flew there. Funniest though were the 319s and new A320s that had a printed placard at each RH door stating the type and reg, but some still have the reg penned underneath! Guess habits die hard!!
Cheers
VSFA