Here is a better photo of the binding. (Note the Music Man HD-150 head in the background).
View attachment 7334651
I have not seen a Cutlass in the wild in a long time.
I'm not convinced the body is original :
1) the Sabre was never a slab body - it was intended to be slightly smaller, and more ergonomic than the StingRay.
2) it has the pre-EB bridge, yet...
2a) it has the EB 3-band EQ, with blade switch, which means...
2b) it has the output jack on the side.
3) it has EB covered poles pickups.
I suspect she used the neck, and bridge from a Cutlass II, and had the body custom made with the electronics package from an EB Sabre.
That's my best guess; is she in social media, to ask directly?
* Edit to add :
Actually, on closer inspection, it doesn't appear to be a Cutlass II neck at all - the string tree is in the EBMM position, and it doesn't have the large gold Cutlass logo.
EBMM did make some StingRays with black painted necks, and headstocks in about 1986/87, yet this appears to have the version of the logo without the lettering aligned with the bottom of the logo, and without Ernie Ball (hard to make out if it even has the Sabre name at the end).
So I'd hazard a guess at a custom made body (and
possibly a resprayed neck & headstock, with added decal), with a transition era Sabre neck, and bridge, with an EB Sabre electronics package....
