I spent many, many years in France and while there I read some older liturgical books that explained what the Golden Mass of Our Lady was. These all explained that the Mass in question was in reality the Mass of the Expectation of Our Lady (December 18). This was especially true in past centuries in Belgium.
While trying to do some research on this connect to the Feast of the Expectation of Our Lady as being the Golden Mass of Our lady, I find out that it seems to be related to the Ember Wednesday of Advent.
Although these two liturgical days of the Extraordinary Form of the Mass (EF) do share the same Gospel of the Annunciation: Luke 1, 26-38 and occasionally the same day; these two liturgical celebrations have very different spiritual moods. Dom Gueranger does not speak of an Ember Wednesday of Advent connection. The Ember Days were days of fasting and not feast days.
Please do not get me wrong, I am not saying that the Ember Wednesday of Advent connection the Missa Aurea is not correct.
My question is as follows: Can anyone locate a pre-twenty-century liturgical source indicating a link between the Feast of the Expectation of Our Lady and the Golden Mass?