On a similar vein, have you noticed how car adverts use reg. plates that will be readable in mirror image, although not necessarily making any sense. For axample, TXO 811. This means that the advert films can be left-right reversed to simulate either left or right hand drive cars for the various countries where the ads are shown
not in a mirror, but someone living near me has one of those dinky "smart" cars, re is LI KKLE. and a bloke i worked with had UP 41 T {not spaced like that]