3500 GT trident emblem?

Some 3500 GT's have the trident emblem within the radiator grille finished in brass rather than chrome - as in the case of the car in the photo attached which is 101-692. Does anyone know if the trident emblem itself is actually made of brass or has the effect been achieved by brass plating?
Similarly some 1950's Maseratis - including the A6G2000 - have the Superleggera script in brass - one again does anyone know if the part itself is brass or is it refinished? And does anyone know where brass Superleggera scripts can be sourced?

https://www.artcurial.com/en/lot-1960-maserati-3500-gt-titre-de-circulation-hollandaischassis-ndeg-am101692merci-de-noter-que#popin-active