As you know, I don't really care if it is part of the Traditional tool-box. If it was, as dr. farr mentioned, it almost certainly would have been the sidereal version we have now, utilizing Precession of the Equinox through the sidereal zodiac. No real surprise there, since Ptolemy himself was aware of Equinoctial precession.
This tropical version is something I had to discover for myself, to make sense of the mundane world. It utilizes the Anomalistic Year, which is about Precession of the Perihelion, a Direct-motion through the tropical zodiac. And the Anomalistic Year wasn't available until Johannes Kepler, right near the end of the Traditional Era.
The Modern tropicalists are being grossly inconsistent
by continuing to use the version of the Ages
that is manifestly and exclusively sidereal.