☆ The marking on the back is smudged and reads "? 銀" (silver). Based on its appearance, I personally believe it is pure silver, but please be aware of this if you are concerned. Size: Weight: Approximately 23g Engraving of a chrysanthemum crest? is present. After research, it appears similar to items presented by the Imperial Household. There is a "? 銀" (silver) marking and a star with an "S" on the back. It appears to be the Tanaka Kikinzoku mark (Hoshi Es mark?). Details are unknown, so please make your judgment from the images. There is some soiling and wear due to aging. Please check the images for other conditions. Please purchase with the understanding that this is a long-term storage item. Sake cup, silver, silver product.