How do you identify Loetz glass?

To identify Loetz glass, check to see if there is a maker's mark on the bottom or interior. Some items will feature a marking, such as crossed arrows or the maker's name. Loetz changed its marks many times, so markings can also be useful for dating the maker's glassware. However, many Loetz pieces are unmarked, often making it necessary to use color, shape and style to make a positive identification. A certified appraiser or experienced antique dealer can provide expert assistance when attempting to identify unmarked Loetz glassware. Explore a wide range of Loetz glass on 1stDibs.