From Olmec website (http://anthropology.si.edu/olmec), retrieved 2004: "The Tuxtla statuette, carved of jadeite diopside, bears columns of incised glyphs corresponding to 162 A.D. The statuette was found by a farmhand while plowing on a hacienda in Hueyapan in Veracruz, Mexico. Figure is wearing a duck bill mask. Incised glyphs decorate all sides of the figure. Dimensions: 15.4 x 9.3 cm."
The statuette was found by a farmer while plowing on a hacienda in Hueyapan, Veracruz at the beginning of the 1900s and has been under Smithsonian stewardship since 1904. The Tuxtla Statuette belongs to the epi-Olmec culture which succeeded the Olmec culture. Carved of jadeite diopside, the statuette is only one of a dozen epi-Olmec texts known to date. The Tuxtla Statuette is the archeological artifact that allowed for epi-Olmec decipherment work to develop. It displays the first epi-Olmec text to have been discovered which includes a Long Count date of 162 CE. as well as one of the most extensive and best preserved texts, making the Tuxtla Statuette especially critical for decipherment of the epi-Olmec syllabary. The language of the texts is the ancestor of contemporary Zoquean languages spoken indigenously in the states of Veracruz, Chiapas and Oaxaca, and nowadays highly endangered.
This object was on display in the National Museum of Natural History exhibit "Objects of Wonder", 2017 - 2021. Exhibit label identifies it as Epi-Olmec, from Veracruz, Mexico, AD 162, made of Jadeite diopside. "The statuette portrays a man wearing a bird costume, complete with wings, bird legs, and a half mask resembling a water-bird's bill (most likely a Boat-billed Heron)."