What is a stock certificate The El Dorado Harper Emporia Oil and Gas company for 5 shares dated October 1917 worth?

The value of a stock certificate from the El Dorado Harper Emporia Oil and Gas Company for 5 shares dated October 1917 would depend on several factors, including the company's historical significance, any existing assets, and the rarity of the certificate itself. Generally, certificates from defunct companies can be collectible, with values ranging from a few dollars to several hundred, depending on demand among collectors and investors. To determine a more precise value, it would be advisable to consult a collectibles expert or appraiser familiar with historical stock certificates.