Guccio NecklaceClassic Gold Chain. This jewelry chain type was popularized by the Gucci brand is often referred to as the Gucci chain. 18K Gold Filled Chain Measures 20 Inches Long Classic Marine Chain Style Marine chain is manufactured using round wire that then goes through complex, multi step machining to create large oval links, cut bar segments, insert and then solder the bars in the center of each large oval link. Finally, the chain is flattened or hammered.