Silver and Blue Candlesticks - set of 3

I purchased these beautiful candlesticks at an antique shop. There is no mark on the silver to indicate the type of metal. I have never polished them. They are fairly lightweight but very stable. The blue accents are ceramic. They are 3 different heights - 21”, 20”, and 18”. Please note that there are spikes to hold the candles in place. These come from a smoke free, pet free home.