Hi all
I am working on cleaning an inexpensive pocket watch with what I think is some generic name: Anti-Magnetique. I have heard of Anti-Magnetique as a concept but not as a brand.
I can't determine what movement is in the case as there are no marking to indicate the movement name.
Anyway, I removed the mainspring from the barrel and tried to measure it as best I can and I have also used the formula to check the length of the mainspring. Using the formula I get a spring length of 566mm (so I can say 56cm) but when I stretch out the mainspring and allow for the end turn I get 54cm total length. Which method should I defer to - I guess it is possible that a shorter spring was put in last time.
Height: 2.95mm
thickness: 0.27mm
Inside Diameter of barrel: 20.82mm
Arbor diameter: 6.62mm
Can I get your thoughts on how to progress. I am just uncertain how critical this extra cm or two will be in the scheme of the age of the watch and the fact that it's just a project.
Appreciate any assistance and thank you in advance