Limited Editions of a Limited Edition?

An interesting puzzle came in a recent phone call. Etchers normally produce a short run of prints from their work and often one of them comes out much better than the rest. These prints are all produced by hand, you roller the ink onto your etching plate and then lay sheet of paper over it and apply the pressure. Each print is from a ‘Limited Edition’. So, what happens if you take the best one and have it giclée printed as another type of ‘Limited Edition’? This challenges the whole concept of ‘Limited Editions’. There’s no law governing ‘Limited Editions’, other that the contract you enter into with a buyer when you say you are selling him say ‘No 5’ of a ‘Limited Edition’ of 50. The buyer would have good reason to sue you if he found you’d sold another ‘No 5’ or if the Edition was expanded to 500. But what if there were two number ‘5’s, one was an original etching print, the other was the fifth giclée print copy from that original print. It would be good to know what the lawyers thought of this?