As seen used in Ben-Hur 1925 and Quo Vadis 1951.
Sold in the 1970 MGM Auction per included catalog tag. Per "Roman Standards" (ISBN 978-1-4728-2180-6) by D'Amato 2018, Osprey Elite #221, on page 46: "The Draco 'windsock' standard twisted in the wind and hissed like a serpent." Introduced into the Roman Army during the reign of Hadrian being borrowed from Sarmatian, Danubian (Thracian), or Dacian prototypes - a cavalry standard.
(OFW) OLDFLAGSWANTED COLLECTION