ThomasM[PuristS]
14331
Yes, unlikely, yes, and
Yes.
Cal.2003 was the thinnest classical handwind ever produced, based on a JLC caliber, itself based on another caliber...AP and VC had exclusive use since it's launch back in the 1950's if memory serves correctly.
Classical means no using case back as main plate, in which case Lasalle and Concord Delirium might vie for claims...as well as new Piaget.