Silver Cob Help With Identification

You have a two reales from King Ferdinand VI of Spain minted in 1750 at the Spanish Colonial Mint at Potosi. A mountain of silver was discovered there and Potosi became a mining boom town starting about 1565. By 1750 little wood for burning was left and had to be carried in long distance so they made coins using crude methods that used little fuel. Other Spanish Colonial mints had better minting equipment by 1750 with Potosi the last to receive minting technology upgrades.

Just to add a little bit to Pistareen's answer, there was so much silver in Potosi that for a time it became the largest city in the Spanish Empire!

By the way, beautiful coin! I don't know what "lots" you're getting, but if that coin is any indication, they're nice indeed!