Hi all,
I have acquired a 1963 H3K with a busted mainspring. Have never opened a Hermes spring to repair it--only Olivetti. Would like to avoid doing so if possible. Anyone know if another machine's mainspring might fit? I have a little boneyard, but no Hermes parts. Looks like 4 cm diameter. If not, any guidance on opening it up? Thanks as always for your expertise. LD