My son has a really amazing Lowrey organ, the Majesty LX/510 model. We found some of its manuals and scanned them in to help anyone else who owns the same model. All three are free PDF downloads:

A Site of Information and Ideas
My son has a really amazing Lowrey organ, the Majesty LX/510 model. We found some of its manuals and scanned them in to help anyone else who owns the same model. All three are free PDF downloads: