First introduced in 1939, the Routemaster buses that were developed jointly with the help of London Transport were present on roads for nearly 40 years. The AEC Regent III can be named as the father of all Routemaster buses and over 7000 were built by the AEC (Associated Equipment Company). 

Several of them were even exported abroad including India. In India, Ashok Leyland marketed these buses.

This bus model is an exact rendition of the one used by London Transport for few decades.