This is the reduced version of triangles to avoid processing problems with the slicer. And flat surface for easy printing.
The original obj is also included.

This is part of the collection List of common 3D test models

The Stanford dragon is a computer graphics 3D test model created with a Cyberware 3030 Model Shop (MS) Color 3D Scanner at Stanford University. The data for the model was produced in 1996.

The dragon consists of data describing 871,414 triangles determined by 3D scanning a real figurine. The data set is often used to test various graphics algorithms, including polygonal simplification, compression, and surface smoothing, similar to the Stanford bunny (1993).

The model is available in different file formats (.ply, vrml, vl, etc.) on the internet for free.

Model is Public Domain.
Image source: 12marky_mark @instagram