Thanks wvrons, the board is a little warped and it has three feet on the bottom which might have been added, as I saw an identical boxed board but it didn’t have feet or any sign that it used to. Yes unfortunately just the top of the lid but at least I can fit in in the frame. A few of the marbles do have little ‘nics’ - I’m not confident with the terminology relating to damage, but they are only small. I’d appreciate if anyone could explain to me what a jellcore is and razor ribbons. I figured I had a combination of solid core, latticinios and then I don’t know the difference between divided core and ribbon core!