Late 19th Century Dining Table

This solid oak dining table with 4 leaves was handed down from my great grandmother.  It is likely that it was a wedding gift.  She died at 92 in 1960 and she was married twice.  So I am thinking she received it around the late 1800's possibly.  It has wooden casters that were not used much based on the shape they are in.  I have searched the internet trying to find a style similar with the legs being the unusual part of this table.  Each leg has a half moon with balls surrounding it.  So what do I have here?  I must sell the table due to a move and know it must be worth something.  It has been refinished once, by me, about 25 years ago.  It has some scratches and dings in the table top but these could easily be sanded out and refinished.  Anyone that recognizes the style or era from whence it came would be helping me out quite a bit here!  Thanks in advance!!