Insignia questions

[Admiraal]

Hello guys, i got some small questions, i hope someone here can help me out.

1. from which date on did they used those brown collar litzen (mostly seen on M43's).

2. from which date on did they used those triangle '44 eagle's?

[Admiraal]

No one knows it?

[Admiraal]

Here an example of an "44 eagle: http://www.germanmilitaria.com/Heer/photos/H033759.html

And here is an example of the brown collar tabs that i mean.. or arn't they brownish?
*Copyright to Lenny W. as i used this picture of his M43 uniform*