Hi guys. How many years did sig make the P220 .45acp carry SAO??

I remember them doing a release roughly two years ago, but apparently it was only 500 guns.

From the Sig website

https://www.youtube.com/watch?v=DeM4ewAZrR8

Here is a small example of box label tags I have come across:

220R3-45-LEGION-SAO
37B062xxx 21Nov2020
37B062xxx Jul2020
37B062xxx 23Jul2020
37B061xxx 31Jul2020
37B063xxx 31Jul2020
37C002xxx 28Oct2020

Pretty scattered for a 500 run