Shop › Vaubel Design- Long Double Knocker Earring Image 1 of 2 Image 2 of 2 Vaubel Design- Long Double Knocker Earring £595.00 sold out Material: 18k Gold Vermeil, Silver Alloy.Details: 18k Gold plated on silver alloy hammered effect long double knocker clip. Sold Out Added! Material: 18k Gold Vermeil, Silver Alloy.Details: 18k Gold plated on silver alloy hammered effect long double knocker clip.