Casio CGW 500] ''Cosmo phase'' (1985) . It's oval-shaped LCD displays not only all nine planets and their orbit around the sun, but also the orbit of Halley's Comet which is visible
Amazon.com: Casio Fx-JP500-N Scientific Calculator, High Definition, Japanese Display, More Than 500 Functions : Office Products
Casio MG-500 Midi Guitar | Reverb
Casio Pro Trek PRT-500 Watch | Digital Twincept Function WR100 Casio – Vintage Radar