Watchmaker's anvil. By EL METAL RaymondMenendez. 11:45 video:
https://www.youtube.com/watch?v=7zC9PHIt30Q
Previously:
https://www.homemadetools.net/forum/...651#post143489
https://www.homemadetools.net/forum/...252#post141955
https://www.homemadetools.net/forum/...277#post130925
https://www.homemadetools.net/forum/...213#post121319