Antique Table - could extend up to 10 feet long

Hello - I am interested in an appraisal of my antique table, please see attached photos. I was told be the previous owner that this is an antique that he paid $400 to purchase, however I was not able to find anything online. There does not see to be any branding on the table, aside from the number "42" carved in the bottom. Frankly, I'm not even sure what TYPE of table this is. 

As you may be able to see in the photos, you can add leaves to the table to extend it up to 10 feet, or it can be as short as 2 feet. There are six legs. The table is in very good condition, with plastic protectors on the "feet" of the legs and very few scuffs or marks on the surface.