I'd go along with the brand-name/modle-name 'Worldsfair' , rather than an actual item from the "Worlds' Fair" , if you get my drift .
I wouldn't loose any sleep about a huge 'antique' value concerning this item ..... but it could be still put to use as a practical scoop/shovel (if it's strong enough) .
If you've really got your heart set on keeping it , I suppose a person could clean it up a bit & hang it on the wall somewhere .
I found the shovel ad on the 'St. Louis' craigslist ... the actual ad had been removed by the seller ( meaning perhaps it sold &/or did not) , lucasadam87 .