In
this photo of the peghead, you can just make out that there was something there, but it wasn't an Alembic logo.
The electronics look legitimately Alembic. 1978 is the range for the serial number on the harness. Might be able to cross reference from that (but not always). The 1/4 looks normal for 1978.
Actually, my guess is that this might be a Becvar, though it would be least elaborate one I've seen. He did make basses with this body shape. I've got photos I'll check on Monday at the office to see if the peghead matches some of his other work. I'm pretty sure I've got some pictures of serial numbers too, so we can see if they similar to this bass. He purchased electronics and hardware from us for some of his instruments.
If it's not a Becvar, mom and I are leaning towards a shop nighter without better serial number documentation. While it's possible this is a true Alembic bass, there are too many atypical things to tell from photos alone.