See an image that represents -tecpantli in the Visual Lexicon of Aztec Hieroglyphs, ed. Stephanie Wood (Eugene, Ore.: Wired Humanities, 2020-present).
Visually, the tecpantli in Nahuatl hieroglyphs is a flag or banner, but should be seen as a number or a reference to a row, line, etc., of things that are counted. As Gordon Whittaker explains (Deciphering Aztec Hieroglyphs (2021), this flag is not to be confused with panitl, or pamitl (in Tetzcoco), and never simply pantli. But pantli will be found in association with a number in texts referring to things that are counted. See examples in our entry for pantli (link below).
yetecpantli onchiuhcnahui tlacatl = 69 people (early seventeenth century, central New Spain)
Annals of His Time: Don Domingo de San Antón Muñón Chimalpahin Quauhtlehuanitzin, James Lockhart, Susan Schroeder, and Doris Namala, eds. and transl. (Stanford: Stanford University Press, 2006), 58–59.
ome tecPantli metl = 40 magueyes (San Pablo Tepemaxalco, Toluca Valley, 1695)
Caterina Pizzigoni, ed., Testaments of Toluca (Stanford: Stanford University Press and UCLA Latin American Center Publications, 2007), 146.
nauchtecpan [sic] tlamamatli xochicacauatl = four hundred cargas de cacao
Actas del Congreso Internacional de Americanistas, v. 11 (1897), 52.
macuiltecpantli mamalli cacauatl = five fardos de cacao, where a fardo is a bale of goods, a bundle, a package
Actas del Congreso Internacional de Americanistas, v. 11 (1897), 52–53.
centecpac tlamamalli cacahuatl = one carga de cacao
Actas del Congreso Internacional de Americanistas, v. 11 (1897), 53.
Tribute labor arrangements were, prior to contact, probably made in groups of twenty people (centecpantli), given the vigesimal numbering system. But after contact, Europeans many have preferred groups of five twenties (macuiltecpantli, one hundred), given their decimal numbering system. We see macuiltecpantli as very common in the Ordenanzas de Cuauhtinchan. (Puebla, sixteenth century)
Luis Reyes García, "Ordenanzas para el gobierno de Cuauhtinchan, año de 1559," Estudios de Cultura Náhuatl 10 (1972), 284–285, see for example, paragraphs 129–132.