From the pictures posted it looks like a nice original Tunic for the Garde Schutzen Batallion for a one-year volunteer.
Not sure where you the Asien Korps comes from.
It's named which is a BIG plus especially since its named to a member of a family with a long military history and tradition.
The shoulder boards are missing which detracts a bit and more pictures would provide the opportunity to give you more information.
If I were you, I would take time to research the name on the tag, that would be a lot of fun and very rewarding.
It's definitely worth the time and effort and it will only add to the value when you decide to sell it.
Thanks for posting the pictures and welcome to the forum.
MFG John Josef
(not an expert just another collector of 50 plus years who loves this stuff}