I really have no idea what it is. From what I found online it is from between 1890-1904 and a product of the New Amsterdam Silver Co. (Now known as Knickerbocker). It looks to me like a rotating condiment tray. All of the 5 bottles are original. (salt, pepper, oil, vinegar and im guessing the other is milk). As you can see from the pictures, it is in good to excellent condition. Any information would be appreciated