A partial watch repairs also known as a "part Job" is a repair that solely consists of only repairing a specific part of the watch. For example; if you have a crack on the crystal of your watch and the watch still seems to run fine you may only want the crystal replaced and the watch movement left and not overhauled or cleaned.
I will do some simple diagnostic checking at no charge and also look for other problems the watch may have that may not be as obvious as the partial crystal repair, or whatever partial repair the watch was send in for. In any case I do find the watch to have any other problems I will let you know.
Part jobs usually consist of crystal replacements, stem and crown replacement, battery, gasket, resealed and adjust hands, etc.
With any part job there is no warranty on running or timekeeping of the watch since only the specific requested part of the watch has been replaced and the movement has not been serviced.