Sayyiduna Anas (may Allah be pleased with him) said that the hilt-cap of the sword of the Messenger of Allah (peace and blessings be upon him) was of silver.
Only Jarir bin Hazim narrated this from Qatadah from Anas, and the hadith is ma'lul (has a hidden defect), as follows.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7570