Here's an old Casio Operation Manual. It's got real light staining, but overall it's pretty nice! See pictures.
Casio SA-1 Tone Bank 100 Sound Small Electronic Piano Keyboard-Needs 6 Volt PSU
Casio SA-20 Electronic Keyboard 100 Sound Tone Bank tested and working
CASIO CA-100 TONE BANK KEYBOARD ELECTRIC/BATTERY. GREAT SOUND
Casio SA-1 100 Sound Tonebank Fully Functional with New Batteries
Vintage Casio SA-11- 100 Sound Tone Bank Keyboard Tested Working
Casio M-100 Casio Club Keyboard
