OK - I discovered that a friend of a friend is a watch and clock repairer so I got the watch sent to him to have a look.
Pre sending it - he said it would depend on the quality of the replica as to whether he could do much with it or not, ie whether the fingers were on splines or just on a pin with the end peened over. I bought it from China over the 'net and had to rely on the sellers description and quality control being as good as they claimed they were.....
Well it tuned out that the fingers were indeed on proper splines and it was a simple job for him to fix - BUT and this is the interesting part, he went on to say that it was the best replica watch he had ever seen.
The watch had a genuine ETA Swiss movement, was spotless inside and the watch serial number, in addition to being stamped in the correct place on the outside of the case - was also stamped internally in the correct places as well.
As the "repair" cost me just