Is this a whale's tooth?

[Sajen]

Hello Harry,

look like antler or indeed whalebone on your last picture, I would sort out other bone. It's sometimes very difficult to determine the exact origin of the used material, even elephant ivory can become very difficult when it's very worn.
And it's very awkward to get a decision without handling the material. So it's my best guess.

Regards,
Detlef