Original ABC toolbox...

Hallo Giovanni,
I suspect that the toolbox in your photo is a 'poser', i.e., a prop for the photo, to make it look good! It's very square at its corners, totally unlike the G&R model that was clearly made from a pair of pressings. There is no mention of a toolbox in the Parts Manual either.
For the record, the photo of the (real) G&R toolbox contains a BSA spanner...
ATB, Paul.