pure flint progressive pottery

 This is a wonderful utilitarian bowl. I looked up progressive pottery an didn't find very much about it. This peice came out of Ohio and it is quiet rare. 1900 - 1904 perhaps. Museums are digging shards on sight and there is a historical society that speaks of this in a short news paper clip on the internet. Other than that I only know history mentioned in the article. I feel like this is an important peice. I have also seen a bean pot made by this pottery co. on Ebay otherwise this peice is scarce. Can you please confirm the worth of this peice? It would be greatly appreciated because I would like to see this bowl with a collector and it is positively mint. Thankyou