"The hand-guard on the sword of the Messenger of Allah (ﷺ) was made from silver."

This Hadith is Hasan Gharib. This is how it has been reported from Hamam from Qatadah from Anas. While some of them reported it from Qatadah, from Sa'eed bin Abu Al-Hasan who said: "The hand-guard on the sword of Messenger of Allah (ﷺ) was made from silver."

Jami` at-Tirmidhi Book 23, Hadith 22