Brass Plaques of English Knights Ledger-stones

RARE FIND! Brass plaque is 3 lbs and 12” tall, 1/2” thick and 6 1/8” wide. Some minor rubs and scratches, back corner has chipped. Front inscription reads: Sit R. Swynborne and son, AD 1412. Little Horkesky. Essex, England. Back: is legible to read in photos.