1897, Richard Zschille, Catalogue of the Collection of Armour and Arms and Hunting Equipments of Herr Richard Zschille: The Entire Collection was Exhibited at the Chicago Exhibition, 1894, page 125:
... surmounted by a gilt plume-holder with star, ear-pieces embossed with stars, movable nasal-guard and neck-guard of six plates — circa 1640.
1907, Albert Frederick Calvert, Spanish Arms and Armour: Being a Historical and Descriptive Account of the Royal Armoury of Madrid, page 129:
... that it was the work of either Hans Mielich, of Munich, or some other German artist of the same age and equal ability.” The sixteen pieces of the armour are blackened, and gilded only at the nails, clasps, and plume-holder.
1916, Elia Volpi, Illustrated Catalogue of the Art Treasures and Antiquities Formerly Contained in the Famous Davanzati Palace, Florence, Italy, page 967:
In front is a panache, or plume-holder, and, behind, a chain-mail shoulder guard.
1925, Francis Henry Cripps-Day, A Record of Armour Sales, 1881-1924
At the back of the skull-piece is a shield-shaped plume-holder — Italian (Pisan), about 1590. From the collection of the Marquis de Rossi of Naples. £ 283 10s.
1976, Robert H. Rankin, Military Headdress: A Pictorial History of Military Headgear from 1660 to 1914
On the left of the skull is a copper-gilt plume-holder. The copper-gilt chin chain is attached to each side of the skull by large copper-gilt bosses bearing a leaf motif. (Wallis & Wallis.)
2005, Stuart W. Pyhrr, Donald J. LaRocca, Dirk H. Breiding, Metropolitan Museum of Art (New York, N.Y.), The Armored Horse in Europe, 1480-1620, Metropolitan Museum of Art (→ISBN), page 53:
The main plate is formed in two halves, the upper plate having small sideplates, ear guards, an escutcheon plate (blank), and a brass plume-holder, as well as a hinged poll plate.
2010, Alan Burt Akers, The Vallian Cycle: The Saga of Dray Prescot Fourth Omnibus, Mushroom Publishing (→ISBN), page 1132:
I did say: “If a sword or axe strikes that plume-holder it'll knock your helmet off —if it doesn't break your neck.” So the Justicar's people, with enormous glee, arranged the tall nodding plumes with holders of stiffened leather which ...
2013, Viacheslav Shpakovsky, David Nicolle, Armies of the Volga Bulgars & Khanate of Kazan: 9th–16th centuries, Bloomsbury Publishing (→ISBN)
This is demonstrated by the scale cuirass worn over his mail shirt, and by his single-piece iron helmet which has a gilded plume-holder, ornate brow plate, rim-band, and large, curved nasal; note too the extended, leather-edged aventail.
2020, Andrey Evgenevich Negin, Raffaele D’Amato, Roman Heavy Cavalry (2): AD 500–1450, Bloomsbury Publishing (→ISBN), page 42:
A disc-shaped finial or plume-holder at the apex is fastened with six small domed copper rivets; it overlays six inverted T-shaped pieces of gilded copper sheet, each attached to the bowl with 15 domed rivets.
