These were the crates that were current when I returned to ESO (played from beta through Craglorn) and now with the Scalecaller crates, I've seen all the old ones that I had missed, which means it could be next month? Just a guess.
Awesome, finally I can have my updated-horse-model white horse.
Would've bought it with crowns long ago but alas, it wasn't available for longer than the blink of an eye.
So at least I can now get it for endeavours haha.