I looked it up, the Elgin 2468 was probably made by Husqvarna for the US marked. I can't reall wouch for it, but it looks worth the effort of a fixup. If it keeps coming appart I would rather have a new one, maybe there something that can be sorted out and make teh the latch stay on.
The Archaic Arcane blog has a post on it. Replacement bobbin cases can be a fuzz, tiny production variations make a big difference from model to model, sometimes grooves, castings, edges etc needs to be grinded down or altered to work with a machine; or better order the right type. An old one for a Husqvarna CB-E might be identical. They
do this in India too, very good visual illustration, but it's not in English. Apparently, 15 bobbin cases comes in endless variations.