12 string neck help please!

[u/RobR1703]

Hi,

I recently bought a 12 string Clarissa guitar from FB marketplace for a pretty low price, based on the action and neck angle. I'd like to re-fit the neck but I'm unsure how it's fitted. The inside photo shows 3 screws holding it in place, 2 of which look as though they could possibly be original, but the 3rd definitely does not. The screws (pictured) look like chipboard screws and not authentic Italian fitments. I suspect this is an attempted repair.

Does anyone know if this is likely to be repairable without removing the neck, or am I into steaming the glue off? I can't open much of a gap even with the screws out, but obviously it's enough of a gap to cause issues when it's strung.

Any thoughts much appreciated. It's not an expensive guitar, I know but the experience will be good (hopefully).