United States. A Pair Of First War Usa Trench Art Brass German Shell Cases, 1918 certificate_of_authenticity with an additional etching of

with an additional etching of a winged propeller underneath the latter

For the next five days

ranging in size from 37 mm (w) x 38 mm (h) to 46 mm (w) x 44 mm (h)

Second Class -  In blackened iron core(magnetic)

marked “Original Olympia”

United States. A Pair Of First War Usa Trench Art Brass German Shell Cases, 1918 certificate_of_authenticity with an additional etching ofA pair of commemorative trench art brass shell cases. First shell with a design incorporating the inscriptions "AEF 1918 VERDUN CHATEAU THIERRY ARGONNE ST MHL TOUL" in large capital letters, the "TOUL" with "TO" at one end and "EH" at the other, with a copper disk bearing the United States coat of arms, along with a silvered zinc army button bearing the German Imperial crown embedded, on a dimpled background, marked "H. L. 37 AUG. 1918 2 67% Cu