Pre Columbian pottery seal?

I picked this up at an estate sale, it is a fairly light weight pottery and the back almost seems like a handle. Any ideas on the age / origin / purpose / who it depicts? It is 2.25" long.

 

Welcome, Jason.
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Here is some general information on Mesoamerican stamps, including one that looks quite similar to the one you have:

https://museum.santarosa.edu/exhibit/17


https://museum.santarosa.edu/exhibit/17/catalog-item/1465

As to age, without specific provenience it is difficult to authenticate such items. Copies and recreations of precolumbian pottery objects have been made for well over a century.