Question about German National flag

[jonobo]

Im not sure if this goes here but I just recently acquired this flag from ebay for about 50 dollars. What I did not expect was for it to be over 6 feet in length! Would this be a flag from the first war or an early TR, which years would this have been used? That is if it is authentic...
Thanks,
John

[Gunny Hartmann]

Can't tell if it's the real deal but it's pre TR!...

[Adrian Stevenson]

Weimar era flag.

Cheers, Ade.