Does anyone have information on the SSB electronics MV 432 Preamp? The PC board is labled "MV 432 V" with country W- Germany.

Specifications, hookup or schematic would be appreciated. I already did a Google search and other than a photo of a "MV432 S" version. I could locate nothing. The "MV432 S" version PCB in the photo is not the same as the one I have acquired.

73, Bill NJ1H