the cross hair only goes to the central plane edge = pie pan.
Where else should it go, there are the arrow head markers...??
I believe all the way its pie pan because this old ref.
Is the center pigmented by aging or intentionally as art?
Where elso should it go, there are the arrow head markers...??
I believe all the way its pie pan because this old ref.
Is the center pigmented by aging or intentionally as art?
Unfortunate degradation, not art.
The crosshairs on a dome dial will go all the way to the edges regardless of the type of indices, including numerals.