Glad you were able to find info online & confirm about the cork. Hopefully you can find a replacement if you need it. Do you think it's Cherrywood?It says "Ropp De Luxe
Made in France" on the bottom and there is only one digit "8" a little ways away on the bottom of the bowl. I found some stuff online and it is cork and it is too fit. The tenon is about .025 and the inside of the place it fits is about .032.
Yep I think its cherrywood. Also the measurements were .25 and .32. So its about 8mm tenon. I can probably find some cork thin enough to replace it. It still works but its a little loose. i might try to add some wax on it and see if that will snug it up.