WWI Canadian Signal Corps Sweetheart Pin

WWI Canadian Signal Corps Sweetheart Pin - Sterling silver and enamels, maker marked "SSR" and marked "STERLING SILVER" on the reverse, 33.5 mm x 34 mm, horizontal pinback, intact enamels, light contact, extremely fine. Footnote: Although the Canadian Signal Corps had its own headquarters, it operated as an integral part of the Canadian Engineers in providing equipment and developing and maintaining vital communications links.