Early 80s would probably be the Subaru Leone/DL/GL, but they are only 230 mm rotors. The B310 Sunny (and A10 Stanza/510) rotors are 245mm. Leone came with either solid or ventilated. With a 44 mm height about 7mm will need to be machined off the hub-mating face of the rotor (they are 15mm thick there, while S13 & B210 faces are only 8mm thick).
Being small, they might fit under 12" alloy wheels???
The mid-to-late 80s Leone series II (1985-1991) had 242mm ventilated rotors. They are still not big, but they are ventilated. With a 51.9 height I doubt these are the ones in the photo.
They come with the same 70mm centering hole as B110, with 90mm bolt circle instead of B110's 87mm (both Subaru and B110 use M10 holes).
And they are cut out in the center for weight reduction, which is always good.