Mine of course. British one is RAD 57 ( was born in 1957) on my 'onda
Best information plate I ever saw though was on a 250 Royal Enfield 'DO NOT REMOVE THIS COVER' was put there by designer knowing people would, to see what was behind it, clean out all the sludge and find they had just done exactly what was needed (clean oil filter sludge trap) bit of reverse psychology
PJ