I found this in one of my boxes of Apple II artifacts:
It seems to be a sort of sound card. It has a 74LS273N 8 bit D-Register, an AM1408N8 DAC, and a LM380N audio amplifier.
From the date codes on the ICs it was made in Y1979 or later.
It's not from a kit (it apparently was wave soldered) but the build quality is lousy and the edges of the PCB were not de-horned, so they sting (the glass fibers still there !).
There are no manufacturer markings or type / serial numbers of any kind in the PCB, as if the producer wanted to hide his name in shame (due to the lousy build quality ?)
Can anyone help to identify this card ?