I bought this nice little Moeris that needs a new balance staff. The movement measures 36.56mm. I cant seem to find out what caliber it is and what size staff it uses. I figured this would be a good learning project to use my new (used) staking set on. Anyone have any idea? There are a lot of Moeris staffs on auction sight with several different calibers but I don't know what to get. Thanks.