i cant believe this thread reached 9 pages within 1 day and still counting !!!
Seriously... tilt shift lens are reputable for being very sharp. May not provide the magnification needed for watch photography though. You may want a macro lens (eg 180mm) or even the MPE65 if you really need magnification and sharpness. In this is the case, the problem will not be that of sharpness but what is the acceptable working distance for TS. All can provide 1:1 magnification, but working distance varies greatly. Its not so easy to adjust and adapt as TS believes.
Also if watches are primarily the concern, get a good lighting setup. You will also need a solid tripod. Some skills in post processing (eg PS, unsharpmask / high pass filter). Also will need practical advice from the experts on how to go about getting the effect you need. they are experts for a reason you know ??
There really are people who are trying to help if TS is really sincere in wanting help.... though the comments seems more entertaining than anything else....