My nan found my Grandads old watch, It used to sit in the van in this state (He was a builder) and I remember shaking it and setting the time as a kid.
It belonged to his brother, And had been in a wooden chest for 20 years!
I decided to surprise my uncle and have a go at fixing it up! It still worked but I completely refurbed it as best I could. Had never done anything to a watch before bar a battery/Strap change.
Stripped down everything bar the actual movement, New glass ect. Took an age to polish those dings out!
(I am an engineer by trade so have the mentality