Doesn't look like it's ever been polished.
WW1 Trench art pom pom shell 37mm French
WW1 Trench art pom pom shell 37mm - Egypt
(#1583) brass WW1 trench art egyptian handmade helmet (Pick up / post worldwide)
WW1 TRENCH ART OFFICERS CAP 1916 SOUTH LANCASHIRE REG THE GREAT WAR
WW1 Trench Art British Royal Engineers Officers Cap Made With 18PR Shell Case
WW1 TRENCH ART VINTAGE AIRCRAFT ENGINE BELT ,RADIAL ENGINE ROTARY RFC?
