Black wool German army (Heer) sidecap lined in grey-blue rayon. Appears by the stamped numbers inside ("A50 N 44") that it was an'issue' cap of some kind.
Alas, no insignia remains but replacements can be found easy enough for restoration. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\Germany\Hats & Helmets". The seller is "interestingstuff2015" and is located in this country: US. This item can be shipped to United States.