It certainly looks old and has a Hallmark on the interior bottom that I cannot ID, but one of the Words is Zinn and I believe it to be a word meaning Tin. Seems to be common on marks of German Metalworks.It has a classic early Art Nouveau Decor and what looks like an English, Scottish, German or Keltic Crest or Shield on the top of the lid. It also has a couple engraved symbols on the face. The mark makes me this this is pretty early but I just have no idea. The item "Rare Antique 1800s ZINN German Pewter Beer Flagon Tankard Stein Bar Pub Mug" is in sale since Thursday, February 27, 2020. This item is in the category "Collectibles\Breweriana, Beer\Drinkware, Steins\Lidded Steins\Germany". The seller is "mstiques" and is located in Bernalillo, New Mexico. 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, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay, Russian federation, Ukraine.