Bogner Uberschall Distortion pedal

I can't find a schematic for this pedal anywhere. It's the black Uberschall pedal. The wrong power supply was plugged in and toasted it. Does anyone know what type diode this is? It's labeled D1 on the board. Is this salvageable? Any help would be greatly appreciated.
 

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  • uberschall toasted part.jpg
    uberschall toasted part.jpg
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