http://www.ebay.com/itm/Seeburg-Solid-S ... SwJQdXBnp~
It is clearly mono, from 1967 w/no motorized RVC. At first glance it looked like something used on a test bench, but the test racks at Al Simon Co had a typical rack mounted speaker-amp for routine testing and tracing.
Was this some econo-export model?
Rob