Sheffield is written in the inside of the lid. The stamps are at the bottom of each pot. I tent to read / see using a magnifier in this order in 4 distinct squares: a star then letter K (or R) a star and letter M, then numbers 2 and 1. And S3108 and 6 below.The set has always been in my family, belonging to my great grand mother who got it from her mom. My great grand mother was born in 1895. The item "Sheffield Silver Tea Coffee Set Lot 19th C VTG Creamer Sugar Pots Ribbed English" is in sale since Sunday, July 21, 2019. This item is in the category "Antiques\Silver\Silverplate\Tea/Coffee Pots & Sets". The seller is "iphischram" and is located in Cincinnati, Ohio. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Ecuador, Egypt, Macao, Peru, Paraguay, Viet nam, Uruguay, Russian federation.