These shell casings are marked 1901 & 1906 WNY so these predate WWI by at least 10 years and are not Trench Art. These vases are 10 1/2' high by 2 1/2 wide not counted the ruffled rim. If you have any questions please ask, I have been collecting these for over 30 years. If there is a particular form you are looking for let me know. Also for more information see Gus Bostrom's book on Dirk Van Erp.
The item "Pair DIRK VAN ERP Shell Casings Vases Arts Crafts Hand Hammered WNY 1901-1906" is in sale since Sunday, February 14, 2021. This item is in the category "Antiques\Periods & Styles\Arts & Crafts Movement".
The seller is "westsidesc" and is located in Santa Cruz, California. This item can be shipped to United States.