If you're talking of the very thin, brass-coloured metal-sheets that are used to cover the surface of the object underneath, then it only consists of copper and zinc (That's what brass actually is - a Copper-zinc-alloy). If you have something else in mind, then please tell me where I can find such a thing... I'm never to old to learn something
i mean guilding meatal. as i described, it is made from copper brass and nickel silver. it has a rather odd ting to it with age, but when first polished is slyghtly pinkish. i've made jewlery out of it my self, only i dont know where to get it. it was given to me. you might try a jewlery suppliers where one might get say silver sheeting and ask about it. havent got any other infomation on it sorry. just know what it's made of and what it looks like.
the person who gave it to me has done gold and silver smithing masters respectivly at uni if that helps.