WW2 (Nazi Occupied Netherlands) Circulated Post Office Envelope - Authentic

Circulated large post office envelope from WW2 Nazi Occupied Netherlands.

Authentic WW2 artifact w/postmarks & Eagle & Swastika stamp.

Obverse Postmark:
- Stamped 18 July 1941 in Den Haag (The Haag)
- Deutsche Dienstpost Niederlande (German Service Post Netherlands)

Reverse Postmark:
Stamped 18 July 1941 in Gravenhage

Measurements (approximate):
9" L/W x 7"H

Note:
The translated writing on the obverse is unknown; unable to confirm the translation.