Pretty sure this isn't ivory. I wonder how many people left a cigarette burning on their organ :shock: and came back to a horse-drawn fire-engine at their house?
Fair enough, I wish whoever made that ivory substitute was still in the game, it's far more convincing than anything you see nowadays apart from prohibitively expensive Elforyn!
I wonder what the substrate is that it's veneered to?
Custard, if you mean the piano keys, these were usually a straight-grained wood such as ash.
The synthetic ivory itself was supplied as a thin sheet. I think I have read something about its manufacture in a musical instruments reference book, I will try to find out more.