There are some quirky things on a real Heritage you might notice. I don't think many here mention it though. After owning and playing dozens of Heritages from 1986 to 2023, I've notice a few things.
The binding does not hide the maple cap at the cutaway unlike Gibson has over the years.
One curiosity is the dot inlays on the side markers in the neck. One of them above the 12th fret sits slightly off center, making it obvious the same tooling was used for well over 20 years.
Headstocks have changed slightly, a little less narrow and the points a bit sharper
Necks progressively (and I mean PROGRESSIVELY) got thicker and rounder since 1986.
Hardware and pickups have changed. Schaller pickups and hardware until early 2000's, then Seymour Duncan humbuckers and Tone Pros hardware, and now inhouse built pickups and Heritage embossed tuners.
Up until 2016 or so, every single Heritage was a custom order. They were a boutique builder before the term was ever coined. Despite all the changes in the past ten years, the company is doing better than ever. Their work is some of the best there is and overall, the history tells a tale of persistence, devotion, and generational craftsmanship that is hard to duplicate these days.