I think it references Heritage Auction (H.A.) and they moved their Long Beach auctions to Dallas due to Covid-19? Link here: https://www.ha.com/information/long-beach-auctions-have-moved-to-dallas.s
i like them all, my favorite is the 1866 $20 Gold Liberty PR63, 3rd from the top. the reverse has always been a favorite of mine.
The NE shilling is the most interesting to me. Quite a rare bird. I've taken an armchair interest in these since the possible discovery of a NE threepence in the Netherlands last May - there's an epic thread about it on CCF.