I agree with Hogarth. There is no birds foot on your 1919 penny.
The only reference I have to this flaw is Peck, page 504. He only lists the flaw against 1918KN pennies, saying that "some" of them have the flaw. My copy is a 1970 reprint of the 1960 original. I accept that nearly 50 years have passed since it was printed and new information could well have come to light, but neither Freeman (1985) nor Groom (2009) make mention of it.
Groom mentions two varieties of the KN mintmark, one wide spaced and one narrow. It would be interesting to know if the birdfoot flaw only occurs with one.
Pawcio, your submissions are hard to follow sometimes. I second the idea that you get somebody to proof read what you are saying.
If you want further suggestions to help you studying this topic try these books -
1. The Identification of British 20th Century Bronze Coin Varieties
David J Groom
published 2009
ISBN 978-1-4092-8550-2
It is only a small paperback but don't let that fool you. It is crammed with useful information and includes some excellent pictures. Detailed enough for collectors at any level.
Groom wrote a similar book for silver, which is also very worthwhile.
2. The Bronze Coinage of Great Britain
Michael J Freeman
published by Barrie and Jenkins 1970, with various reprints
3. English Copper, Tin and Bronze Coins in the British Museum 1558 - 1958
C Wilson Peck
published by the British Museum 1960 reprinted 1970
A massive book with a massive price, but absolutely awesome.
Hope these help you on your numismatic journey.