Sinisi Antonio (SA)

[Eternas Ondas Musicales]

Small Italian label.

SA 0100 - Sinisi Antonio - Estovest - 1991 (music by Antonio Sinisi)

[Mr]

Wow, that's an osbcure one.

Personally, I read "Estovest" as the LP's title rather than as the label name.
- Which means I'm not entirely sure how I would categorize this, label-wise.

I would guess "SA" = Sinisi Antonio... so label name either "SA" or "Sinisi Antonio", perhaps?
These tracks aren't listed in SIAE either, so not sure about which publisher housed these cues.

[Eternas Ondas Musicales]

I think it's because I haven't been searching the SIAE repertoire correctly; you should show me how to search for editions or composers.

Apart from that, it's possible that that is the name label.