E and F letters on the 109 altimeter

[SCG_motoadve]

E on the top left and F on the top right of the altimeter, what were they for?

[Benti]

Hey mate, I just saw this and did a quick look on the forum.
Found this here: https://forum.il2sturmovik.com/topic/3439-hohenmesser-fl-22320/

 

hope this will help you

[SCG_motoadve]

Very smart, I wish General aviation airplanes had those too.