Hi,
Just found a list of a lot of Bulova mainspring sizes, see below.
https://www.cousinsuk.com/PDF/categories/7776_GR%20Folder%20Page%2031-4…
Regards
Florian
Reverend Rob
Posted November 4, 2019 - 12:45am
mybulova_admin
Posted November 4, 2019 - 2:50am