My buddy sent me this funky old thing for repair. It was made in the US in the 60s by "Marlboro", no idea if there's any affiliation with the cigarette brand.
This unit has a spring reverb, tremolo, vibrato, and "echo". The echo is not like a delay, it actually just puts a deep square wave trem on the spring reverb signal to simulate an echo
The tremolo, vibrato, and echo modes are all kinda not something I'd really ever use, but the reverb actually sounds really cool. It's not like a great Fender spring verb, but it's WEIRD. Would be really cool for recording
Anyway now it's fixed and ready to go back, figured I'd share before it goes back since this is a pretty unique little thing