Gate Leg Dining Table

I bought this table at a sale about 5 years ago.  It's a beautiful table with some minor signs of wear. I think it's made of Oak.  I have been told it could be late 18th century or early 19th century. I have looked at hundreds of tables online and at local sales and I cannot find any with the design on the frame of the table. I would like to know more about the table and an approximate value.  

Fair