There seem to be two versions of the fetish replica. This one, originally sold by the defunct TintinBoutique.com, and another by Moulinsart [example], without the ‘restored’ look. I believe they’re both made out of resin (not wood), with the former going for as much as $500(!)

Some interesting inside info (and a short quiz) on the album here: https://www.tintin.com/en/albums/the-broken-ear