Need Help is this German coat original or not?

[Panzer1939]

Hi just wondered if any one can help I'm not sure if this is original ww2 German it has a stamp inside but no date?

[TWS]

Appears to be original but not really in collectible condition. 88 strikes me as a small chest size for an overcoat.

[Panzer1939]

Thank you TWS I wasn't sure if it was post war because the lining is green and I couldn't find any ww2 ones with green lining online.