Watertown Slide Dining Table - Walnut

Good morning,  I'm looking into what to do with my mother's dining room table. It's a neat piece. Upon many internet searches, I can't find anything quite like it.  It's Walnut with approximately 6-8 leaves that fold on top of one another beneath the middle of the table. From what I can make out on the stamp, it's Patented June 18th, 1890 ... made exclusively for ??, Chicago, IL. Basically, I'm wondering if there is any interest in the antiques community or if I should just drop it off at Goodwill.  Just curious! Thanks so very much!