Conyac で依頼された翻訳結果を公開

International Silver does now own this brand. According to what I find, Chalfonte came into existence in 1926. It's possible that was based on an earlier pattern made by Wm Rogers.

According to my reference books, the star and eagle along with the name of Wm Rogers were used at least until 1895. It was licensed to Simpson, Hall, Miller & Co. to use until 1895. At that time, it was used on silver plate pieces. Earlier in its life, it had been used on coin silver pieces.

You may want to take this set by an estate silver shop or high end auction house to see which construction it is. If it's silver plate, its value is not great. Coin silver could be more valuable because of the silver content and historical value.