Aircraft Recognition Manual, German for RAF Aircraft, "Britische Flugzeuge Erkennungshandbuch"

Here is an authentic WWII-era German Recognition Manual for Aircraft of the British Royal Air Force.  The manual contains photos and silhouettes of 30 primary aircraft of the RAF in operation during the war.  Each aircraft is described using 4 of 64 pages, including its key dimensions and armament. It appears to be early WWII as it includes some pre-war RAF aircraft which were obsolete quickly and not later aircraft, as well as only early war US aircraft such as the Douglas B-19 bomber.  Otherwise, there is no definitive markings which indicate date of publication or its actual publisher.

It is missing its cover and the pages are held together by a metal retainer. But the pages are intact with only a few tears and markings.  Measures 6 inches x 8.5 inches.