I just came across your post while I was searching for Ari/Arri hooks

Although the post is a few years old I thought I'd reply.

The hook is a tambour hook and you can get replacement hooks for the holder. The modern hooks are not so grand and the one you have is valuable.

I sell the modern hooks from my website www.tambourbeadembroidery.com

If you look on the section about buying a hook there is a video showing hooks and holders

Jan