There's not much in the file, just the original index card with scant details:
LSBI 75-246
top: Lacewood
body: not recorded
back: Peroba Rosa
neck: Maple and Walnut, 34 long scale
fingerboard: Ebony with mother of pearl ovals
peghead veneers: Zebrawood
electronics: PF6
birthday: not recorded
originally made for: LD Heater
That's all there is.
The chrome switch paddles are typical for the time.
I am not familiar with Alembics that have only band-pass filters. There are several that have switchable filters that can cycle through low-, band-, high-, and notch-filters. But these have many more controls on the face.
Now for some speculation. The core is a light color, so it's probably not Mahogany. As an educated guess from common body woods at the time, I'd say possibly Birch or Maple. It doesn't look dark enough to be Narra or Cherry, which were also in use.