How to tell BLTouch v2 or v3

How do I tell if my BLTouch sensor is a v2 or v3? Are there any external tell-tale signs?
I tried looking online but it did not seem to be conclusive.
I bought it in Feb 2019 if that helps.

It is written on it. If not sure, please post pictures of your BLTouch here.

Sebastien is correct, it is written on the PCB. If you don’t see a serial number on there, you can check to make sure your BLTOUCH is genuine by going to here: http://id2db.com/genuine.php

Ah, so it is, v2.2.
I have my BLTouch mounted with the label facing backwards. Does that cause any issues?

No, it is not important.