This piece is not familiar to me, so I will opt-out and allow another expert to answer in my place.
Good day my name is Tim
I am a Certified IRS Qualified antique appraiser. It will be a pleasure to put my expertise, libraries, resources, and experience in the field to work for you.
Thank you for including so many photos of the piece. Is it possible to send a few more? I need you to be my fingers and eyes. Lets look at the underside of a drawer. When you run your hand on the surface is it smooth or wavy? Also on any of the unfinished area are the a series of parallel lines? Are they curved or straight? Next can you send photo of any screws or nails that are used any where on the desk?
Thank you for the additional pictures. It has the look of a Southern Federal Plantation Desk made in the 19th Century. To determine early or late I need to see the hardware. You included the lock, so can you send one of the hinges and the back of the drawer pulls.
After looking at several hundred plantation desks that have sold at auction. I agree there are very few that look like yours. These were made individually by small shops. The current market is soft on 19th century furniture no matter how unique. You have what appears to be an American Late Federal early 19th century Maple Plantation Desk, with
molded cornice, paneled lid, and angled pediment with a drop front baize writing surface and interior fitted with cubbyholes and drawers, the lower case with two drawers, turned legs. The piece has been restored at some point. The current auction value range is $1,500.00 to $2,500. For insurance purposes the replacement value is $3,000.00 to $5,000.00.
Have a very Happy New Year