This is a part from a (severely amateurish) Piezoelectric transducer amplifier circuit. I am looking to identify this diode so that I can find a datasheet for it as well as possibly purchase more. ...
I can't remember the source of this image, but I found a similar image in an Ekulit catalog. One recommended circuit shows just a resistor in series with the piezo buzzer. But this one adds a diode. ...