Bosch PSR 18 LI-2 - exchange planetary gear with shaft for drill chuck - iFixit Repair Guide
VINTAGE YAMAHA PORTA TONE PSR-18 PIANO KEYBOARD 61 KEY. | eBay
User manual for Yamaha PORTATONE PSR-18 - a user manual, servicing manual, settings and specifications ofYamaha PORTATONE PSR-18 - User manuals and advice for your devices - User-Manual.info