Large Rare Mayan Flayed God Xipe Totec whistle that plays several notes

Large Rare Mayan Flayed God Xipe Totec whistle that plays several beautiful notes. It has holes so it so it can be worn as a necklace . This deity is rarely seen in the Maya art. Xipe Totec  is more common in Veracruz and Aztec pueces. This was one of many whistles found in a cache in Guatemala. 4” wide and is very large for being a whistle. 
Ex Arkansas Estate collected pre 1970.