I would personally avoid any TrackMaster listing that is purchasable from anywhere in China. I know the engines are made there, but usually the market is flooded with knock offs. Japan, EU, AU, US and other markets generally have legit toys thats why its best to keep away from items from china listings in my opinion.
And also Duncan was updated when he was introduced into the TrackMaster Fisher Price range. He gained a brighter yellow colour, gold lining instead of yellow, lost his windows sticker, lack of paint on pistons and his chassis undercarriage became yellow. From 2010 - 2011 he had normal black wheels but in 2012 they updated him with the two hole wheels due to the engine being considered more safe in packaging (plastic ods in the wheels went into the packaging), until he was retired in 2013.
And also Duncan was updated when he was introduced into the TrackMaster Fisher Price range. He gained a brighter yellow colour, gold lining instead of yellow, lost his windows sticker, lack of paint on pistons and his chassis undercarriage became yellow. From 2010 - 2011 he had normal black wheels but in 2012 they updated him with the two hole wheels due to the engine being considered more safe in packaging (plastic ods in the wheels went into the packaging), until he was retired in 2013.