There are 3 basic rules to follow when changing the clasp
- Always change the clasp for the most similar type of clasp that is already on the watch. I have seen some strange repairs over the years where people have changed one type for another (ie. butterfly clasps for Z-Type in one case) and it never works well.
- Find the closest match before getting the file out.
- Never file the bracelet to fit the clasp, always file the clasp to fit the bracelet. If the customer does not like it for some reason you can not un-file his or her bracelet
Follow these rules and it is very easy and profitable