German Pocket Advertising Mirror
Vintage German advertising mirror, probably from the 1930s. The text translates roughly to "Our flour is quality flour. Hefftsche artificial mill" (the last word doesn't translate well). It has great graphics - the plane looks like a JU-88.
The mirror on the back shows wear and is a bit cloudy.
It measures about 2 1/2" by 1 3/4"