1] If Rolex was to issue a document confirming that the Ex dot and underline were for the Canadian for US market, of course they will be right. But for what reason, the need to mark specially these watches? Not for tax reasons, but IMHO , to identify those 'Guaranteed Radiation Free" watches. Good marketing, as well as perhaps in anticipation of new health and safety regulations. NY ban, remember? Why not for other countries? Because the US were the leaders in consumer safety and rights in those days. Still are today. The Authorities in many other countries had little interest in these issues, so there was no need ..
2] Why are these marks seen largely on the professonal watches, and not the other watches? IMHO again, these watches that were so marked were so marked because they have much higher radiation levels when radium was used, so was the focus of attention. Also, these models had an institutional and corporate market, so these customers may have had some influence on Rolex to clearly show the safety of their products. T on milsub dials?
Non tool watches had small plots, were generally not sold to institutions, so no attention was put on these items. Maybe becauuse of their small plots, the radiation levels were well with safety levels in the first place, even when Radium was being used. So no issues here.
This message has been edited by munchiew from IP address 188.8.131.52 on Feb 15, 2012 11:34 PM