Antique Wireless Association member Brian Harrison, KN4R, noticed radio equipment marked "EEIS" showing up at swap meets. Researching this, he determined that this equipment had been identified by the Enemy Equipment Intelligence Service of the Army Service Forces as useful enemy war materiel and brought back to the US for further study. Brian produced this video about the work of the E.E.I.S during World War II, with a focus on radios captured and marked with unique EEIS numbers and shipped to the U.S. for further evaluation and writeup. You can watch it here: 73, Mark ~ AE2EA