I would love to take any of the "Gen >1" honey gold pieces -- those made after all the "165th F.A. Lange Anniversary" pieces c.2010 -- and compare it side-by-side with a brand new honey gold piece. There were rumors that Lange changed the alloy composition sometime after those initial pieces were made, perhaps because the color change was an undesirable problem.
I really want to know if a honey gold Lange made around 2016 is darker than a brand new honey gold piece.