At VSL it is called galvanoplastie, galvanized crystal. I might have the design on the glass in question, but I'll come back to that tomorrow. At VSL I don't think I've ever seen partly galvanized wine glasses, just bowls and vases and the odd pressed tumbler but galvanized entirely. I've had pieces that showed wear and you could see the different layers of metal underneath the top one. Stemware was just gold decorated, for as far as I know.
Just to illustrate, and it's not that easy to see, but on the vase it's the easiest ... You can see on both items different colours of copper, yellow and red underneath eachother and under that, although that's not visible, a white-metal or silver base. The wear is due to use of polish, a pain to remove from the pattern once it's old and dried-up, but i use wooden toothpicks. The wear and loss of patina are a bit less visible by applying clear bees wax and after a couple of days the copper turns several shades darker.