The first right-hand-drive chassis, U2RA001, came to Perth were it was MTT 500 and operated mainly out of Morley Depot. It was photographed on Walcott St, Mt Lawley, operating a 60 to Morley, February 1973:
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Already officially withdrawn, 500 was taken out on an enthusiasts' extravaganza & is seen in the West End Causeway busway near the MTT head office, 3 February 1980:
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500 was amongst a number of MTT buses bought by Smithfield Coach Imports in the early 1980s, though being the sole AEC amongst similarly-bodied Leyland Worldmasters. Passing on to Bosnjaks BS at Endensor Park, it was not operated by them but was on-sold to the Fairfield-Cabramatta Police Boys Club as KOV997. It is seen parked outside that club in Railway Pde, Cabramatta, in full MTT livery, 22 November 1982:
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500 went on to operate with Katoomba-Leura Bus Service as MO9476 ...
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... and more recently was discovered at Lawson in company with an ex-Perth Worldmaster:
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Adelaide & Melbourne also operated AEC Regal VIs. I also found this curious comment in the AEC Gazette of September 1962:
Any of our Sydney experts care to comment on this?A recent delivery to Sydney, where a fleet of nearly 800 AEC buses are operated, was a special Regal Mk VI with torque converter transmission, air suspension, and direct air brakes. The chassis was to undergo experimental service trials with a number of Australian passenger transport operators.

