I never knew that. What is the bass clef meant to look like/indicate?
@The4thCircle
Indicates the F
You can see some of the early forms of the G-clef when you scroll down to the history.
@The4thCircle
I think this is all manuscript, it just needs to be legible to a publisher who probably is used to interpreting rough manuscripts. If it was for performance that would may be different. These are unambiguously good G-clefs for what they need to do.
Mozart composed freehand and simply published with very few corrections. Very different to the manuscript of an author which would have gone through several revisions.