The bus - KMB introduced 210 AEC Regent Mk V buses into its fleet between 1963 and 1966 to cater for increasing demand due to the rapid growth in population at that time. The bus was unprecedented at that time in terms of body length (34 feet) and passenger capacity (117 passengers). Three yellow bands on the front panel of the bus denoted the introduction of one conductor scheme of the 1970s  whereby one seated conductor replaced the three roving conductors and changed the passengers' habit to boarding the bus at the front. These buses was deployed mainly on the busiest routes in the Kowloon Peninsula, such as 5, 6, 6B 6C, 6D and 11.