Quick and basic idea and question. Question..... Is there a ref book or sheet or anything out there that will match up a Company, Model, Grade etc to the size of the winding arbor? Idea...... If there is not would you all mind helping me in creating one? I am interested in creating such as the common question I get is....what size key do I need for this watch? Obviously the list will be long and will take time but I would like to post it here and direct people to it.