Information on Vega E-300 DuoTron
 

I have a 1951 Vega E-300 equipped with the DuoTron controls on the tailpiece. Although it is in miraculous condition for its age, it lost the original bakelite pickup somewhere in its 65 year lifespan. I know tracking one of these down will be next to impossible but I hope my question isn't as hopeless.

I was curious to see if anyone here has a schematic of the DouTron controls. These are the controls with the rhythm button that cuts the bass frequencies to give it a bridge-esq tone; ingenious, actually.

Any help would be greatly appreciated.

https://drive.google.com/open?id=0B9...E12aU5yb2hiWFE

https://drive.google.com/open?id=0B9...E12aU5yb2hiWFE

No one has anything? Nuttin'?