Hi! My name is Will and I can assist you. This company was known for artistic rendering of commonly used items. Quadruple plate means the base metal, generally a copper alloy, was electroplated four times to give a very strong and durable finish, but there is actually very little silver used in the process...perhaps a few grams. Based upon a review of information you provided and published completed sales data for similar items, the current market retail replacement value for your is estimated to range from $75 to $125 based on overall condition and regional market demand. Hope this information helps and thanks for using JustAnswer!
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