Ok guys hopefully someone will know, just doing a service and apart from the serial number 669793 there are no other marks to say what Cal this movement is. The mainspring was broken so I need a new one,
my measurements are as follows 195mm long
1.38mm high 0.07mm thick, barrel inside diameter is 6mm and it’s 1.75mm deep.
having looked on cousins they list nothing with these dimensions and I’m seeing nothing in my Generale resorts book, but the eyes are tired and there’s a lot of figures in those books.
with the measurements I’ve given where would I be able to deviate on these, ie length, thickness etc, a kinda rule of thumb for spring replacement in the future, as I also have a need for a new spring for a ladies smiths empire 7 jewel movement again with no Cal number on it either, cheers for the help guys