Python is Python. They don't designate them re "model numbers."
You've got a Python. That's all it is.
Well, to be fair, there were some Python "models" IMO. For example, the much sought after Combat Python, the Python silhouette, Python Hunter, Python Target (38 special only), and probably a few others. In general, Pythons are Pythons, but there were Python "models" as I would describe it.