EARLY 1880/90’S FRENCH STYLE US BINOCULARS, COMMERICAL??, LEFT EYEPIECE IS HM’ED “MAREL”

US CIVIL WAR ERA 4 SECTION BRASS “SPY GLASS”, TYPE AS CARRIED BY CIVIL WAR CAVALRY OFFICERS, 16 1/4″ LONG EXTENED, 1″ DIAMETER MAIN LENSE, NEEDS LIGHT CLEANING TO FINE