Elka, an Italian manufacturer, was mostly known for organs but produced a few interesting synths including one of the finest in the 'Synthex'. Which as mentioned many times Stevie Wonder had produced for himself after the production had ended. Currently the company produces guitar equipment I guess and is handled by General Music from the web links I'm seeing.

Products:

Rhapsody Soloist 505 Synthex EK-22/EM-22 EK-44/EM-44