Interesting Nicaragua Am Cvr. Auxillary Cancel

Whereas this item is NOT a very pricey one, I find that as a total cover it is interesting and a keeper.
A. It is from a Gold Mining Company in Nicaragua
B. It has a NICELY centered C28
C. It has a VERY unusual United States Auxillary marking upon it
"RELEASED BY POST OFFICE INSPECTOR ON AUTHORITY OF CENSORSHIP
OFFICE"

Unfortunately the date is not readable, but the stamp was issued in 1932. So, here it is...