The Vintage Casio SF-4000 Digital Diary Organizer Calculator Calendar PDA is a rare and collectible electronic device from Japan. With its unique features and vintage appeal, this product is sure to appeal to enthusiasts of vintage electronics and collectors of rare calculators. The Casio brand is known for its durability and reliability, making this digital diary organizer a valuable addition to any collection.

Two of the back screws are missing and the other two are stripped. Untested.