Casio SA-11 : Five minutes before breakfast - YouTube
Casio SA-11 | Sound Programming
Vintage Casio SA-11 (Japan, 1990) – Mini Keyboard Synth, ideal for Circuit Bending! Retro Classic! | Reverb
Amazon.com: Casio SA-81 44-Key Mini Keyboard Bundle with Power Supply, Key Stickers, Instructional Book, Austin Bazaar Instructional DVD and Polishing Cloth : Musical Instruments