I have no idea...just showing photo of the small desk.
Did an image search. The small desk is a table used at least twice by President Ronald Reagan for signing documents into law.
https://www.forbes.com/sites/beltway/2014/07/30/what-ronald-reagan-didnt-say-about-the-eitc/?sh=68dd350f26eb
https://reagan.blogs.archives.gov/2017/01/16/what-goes-into-making-a-federal-holiday-ronald-reagan-and-martin-luther-king-jr-day/