Personally, I won't do this sort of thing, because no matter what your intention might be, if you sell the watch, you don't have control over what someone else may do with it or sell it as.
This is a real issue with LE's of certain types. I have the ability to use the Omega Extranet to put in a serial number and be able to tell what the reference of the watch is. This allows me to verify if a serial number that appears to be an LE, is actually an LE - Mitsukoshi Speedmasters, Mauri Speedmaster Reduced, Japan Racing, etc.
This isn't a theoretical issue, as I get asked several times per week by PM here to check a serial number for someone, and the number of times it comes back as a converted watch is alarming. I choose not to contribute to that problem.
For example, I just had someone PM me a serial number this week to check to make sure a watch they had bought as an "original" LE was actually the LE. Unfortunately the that person it was a regular model that had been converted, so they paid a premium for the watch when it's not warranted.
There are watchmakers who will do this, and that's their choice, but Omega would certainly not approve of them doing this, so it could have repercussions for them if Omega were to find out.
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