Anyone know the story of this and what it's worth?

It was given free to all ticketed members of the Knights in 2011 when Tinkler took over the club - because Tinkler reduced the prices of memberships quite drastically straight away, this was compensation to those who bought their memberships at the start of the season and paid the original price.

Never got one myself being in NZ and being a non-ticketed member. Wish I had, it's a very nice jersey!