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.
John Lofgren Monkey Boots Shinki Horsebuttt - $1,136 The classic monkey boot silhouette in an incredibly rich Shinki russet horse leather.
Grant Stone Diesel Boot Dark Olive Chromexcel - $395 Goodyear welted, Horween Chromexcel, classic good looks.
Schott 568 Vandals Jacket - $1,250 The classic Perfecto motorcycle jacket, in a very special limited-edition Schott double rider style. 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.