One Kran Bronze Red on White Paper
Experimental Issue

CLICK TO ENLARGE

In 1878, due to the absence of high denomination stamps for use on the parcel post receipts (Bar'na'meh), the existing clichés of the lion issues were retouched and used for the printing of the 1 Kran, 1 Toman (10 Krans), 4 Krans, and 5 Krans stamps. 
Since there was no indication of the denominations on these clichés,  to remedy the problem of distinguishing the Kran from the Toman denomination, the postal authorities have decided to use various color inks such as gold and bronze, but after printing a few copies, the idea proven not be acceptable and thus they have decided to use colored papers. Yellow paper to indicate the Kran denomination and blue paper for the Toman denomination. Apparently, to make the necessary quantities of these colored papers, they died white porous paper stocks with available natural dying agents such as Turmeric, Saffron, and Indigo.  

The ONE KRAN BRONZE RED, type C cliché,  shown here is the only copy known to exist which is apparently one of those few examples prepared but never issued. This copy is used on a portion of a 5sh postal envelope with an additional 10sh blue & black stamp of the first portrait issue of December 1876.