Can anyone tell me where to buy roller jewels by size and, how do you measure to get the length or do they just come in short and long sizes? What I have found in my search so far is some have a mm length with the width.
For vintage pocket watches you are interested in the diameter and if it is single roller (long) or double roller (short). There is also shape, round or D shape. Most watch supply houses have them. They may be listed as roller pins.