I believe there were 12 holes, same as the Lebaron Bonney photo illustration.
From "How to Restore Your Model A - Vol 6:
"The glass was a special (thin on thin) safety glass with glass setting tape on the edges. The frame is installed with 5-40 x 3/8" oval head machine screw (nickel). Be careful the screws are not to long or that you over tighten them, as they will dimple out the exterior frame."
I believe the body socket hole on the door and rear quarter to be 7/16".
Verify before drilling, as I don't want to be responsible!