So, I was going through the season 3 episode titles and I totally realized this:
301 is called ‘SO’
and 313 is called ‘NS’
Took me a while to notice it and then I realized why they did it that way. Remember when Jax puts his ‘SO’ ring on John’s grave? He puts the other one on his grave in the last episode. Kurt Sutter, you are one sneaky motherfucker.