Does the 109E have armor?

[JtD]

Galland in his book the first and the last mentions when his 109 got the armour plate installed, because he didn't like it when he saw it, but then was happy he got it when it was struck by a cannon shell soon after and saved his life. Not sure if his statement has a date to it, can't look it up at the moment.

[ATAG_Doc]

It was during BoB I have the same book. He bumped his head and was very angry about it. But later the same day it saved his life.