Vintage rare signed Coro gold plated ribbon pin with amber baguettes and round crystals and clear aura borealis rhinestones. If you look carefully at one of the bends in the ribbon- (11 o'clock in the first picture) it is enameled - but that is the only part of the pin that shows the brown enamel. Either a production issue or possibly the rest of the enamel has worn off. However, by my eye- it does not look like any other part of the ribbon had this enameling.