Germany 1936 Cover Help

I wonder if anyone has any information to help me with this 1936 German cover. Thanks

That Zep hand stamp looks awfully sketchy.

Probably obvious, there is a stamp missing under the Zeppelin, I can see the toned background.

The missing stamp explains why the cover appeared underpaid. The cache is found blurry sometimes and looks OK to me. It seems like a genuine flight 33 cover. There were over 100,000 pieces of mail carried on that flight so it is not rare or even that scarce. Still a cool slice of history. The missing stamp and rough top with hinges hurts it.

Addressed to the non-distiller producer of Wild Turkey Bourbon, although 6 years before they began to do so.

I don't see anything that raises a red flag. Appears to be a common cover from the 6th North American flight of the Hindenburg, 5 Aug 1936.

It does have a nice "e" transit cancel from the Frankfurt airport -- Michel cancel number A-20-05.

I think it is likely okay since it is not trying to be anything rare or costly. It has some serious detractions that keep it from being something most collectors would want for their collections especially since nice clean examples from this flight are not hard to find for modest prices. The detractions on this example include the damage and discoloring along the top edge, the missing stamp, the blurry cachet and the torn Mit Luftpost etiquette.

As rogdcam said, the red violet hand stamp is more often than not blurry. Paper and markings look genuine, and the sulfuric acid-laced gum has been "having its way" with the stamp and envelope.