I’ve seen a few Korean Air 777s on test at Everett since we moved here.  This one was heading out on a delivery flight on a Friday evening.  The only reason it gets a post is that, from what I can discover, this is the last 777 that Korean Air has on order.  They have a bunch of 787s to come in the coming years but this is their last 777-300ER.  They haven’t ordered the 777X (which, given how many different widebody types they operate, is quite a surprise!).