Need help on ID of a Morgan Dollar

Hi Community,

I have a couple of Morgan Dollars that I think might be unique. The dates are 1890 & 1891. I would guess them to be around MS58-60. So far no big mystery, but this is where it gets interesting. They are in a plastic holder, the "clasp" type like for cards ect. The interesting thing is that they are labelled as follows:

From the Million Silver Dollar display at the Seattle World's Fair!

Do any of you "Morganites" (hope no one got pissed from my grouping category) ever heard of or know anything about this Million Dollar Display thing. I do not even know when the fair was!

If for no other reason than my own education, I would appreciate any info that is available.

Thanks for reading this.

Todd