This is a traditional blouse worn by the women of Chamula, Chiapas. These are rare rare, I've seen them sold only one other place ever.
The satin is buttery soft and the top portion of the shirt has two layers. The yoke of the neck is very thickly embroidered and the sleeves have tiny pleat work and ribbon applique.
This one is in good condition but has clearly been previously loved.
chest 23 Inches across and length 25 inches.