Fisher K-10 Spacexpander. 2X Partial Units, In Original Boxes. Untested. Parts

Vintage tube preamps, with spring reverb. These are used professionally, for home studio recording reggae music. Originally used with Fisher tube amps to give a live sound to home audio systems. No way to test. As is, needing tech repair/rebuild. Parts missing. One unit has controller, and tank requiring new springs, Fisher branded tubes. Original boxes are in bad shape. Other unit is the preamplifier only, no tubes. I had intended to make a stereo pair inside a single unit, for recording, and had too many projects, such as guitar builds. I think these are great for Fisher tube amps, to have the complete vintage setup! Cool invention!