Here is information I received. Bottle has facets of hand cut crystal. Collar is silver plated with a gold wash inside of cup. Not hallmarked but the xrf test reveals that it is genuine silver exterior.
He called it coin silver. A small chunk is removed from near the bottom (probably in a previous test) and by touch it is a thick layer of silver.
Top twists to open and seals good. There is some brass on the hardware. Top of lid has Eagle (or other winged bird) from a likely Prussian/Baltic Crest. Approx measurements: 5.5" x 2.75" x 1. Slight brown staining on inside of flask.
I cleaned some of it off but could not get everything. Minor dents on top and bottom of metal.The item "Antique Vintage Silver & Cut Crystal Spirits Flask 19th Century" is in sale since Friday, January 22, 2021. This item is in the category "Antiques\Silver\Sterling Silver (.925)\Bottles, Decanters & Flasks".sparrow" and is located in Chicago, Illinois. 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, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay, Russian federation.