Hi Camilla, This object appears to be an effigy of a turtle. I do not see a vessel opening to the top, leading me to think the object is likely a simple effigy. However, is the object does have small holes, it may be a rattle or a flute (whistle) instrument. The estimate is based on general Pre-Columbian turtle effigies in similar height. I believe this is the last object you have submitted. If I missed one, please let me know. Thank you very very much for uploading so many objects from your dad's collection. I hope I was able to provide some useful information for you and your dad. I have definitely expanded my Pre-Columbian education with this collection and I very much appreciate you for that. Please take care.