Hello y'all. I've found my first watch (my mother bought it for me in the late 70s), a mechanical Okura with a flex band and a BFG866 mechanism. I'm trying to fix it for my kiddo. He's only one now, but hopefully he'll use it in a few years, or at least have it working. It works fine, but there's a broken spring inside that prevents the crown from engaging the winding mechanism. Anybody knows where I can get that tiny spring? The mechanism is 27mm in diameter. I'm attaching some pictures.
Thanks in advance for your help and best regards.