Signed-In Users Only
This video is available to all users signed into their account and enrolled on a course level.
Choosing a new mainspring by size
This video details how to choose a new mainspring by measuring the old one and the barrel of the watch it came out of. It also details the use of the popular GR mainspring reference book.
PLEASE NOTE: This is a video meant for entertainment purposes only – it should not be considered part of our watch repair course.