Like many brands, Rolex produced https://www.brwatch.to/product-category/premier/ gilt dials for its sports watches in the early '60s, including https://www.bruhren.de/produkt-Sammlungen/top-time/ Subs. These dials were produced by a time-intensive process that exposed the https://www.pnhorologi.it.com/Collezione/luminor-due/ underlying metal of the dial blank. Since the technique exposes the blank brass underneath the dial's face, this often results in golden text and markers. A lacquer is also added, giving the black dial a "glossy," shiny finish.