A real philatelic treat. The first Polish stamp affixed to the envelope of Leopold Kronenberg of Warsaw, with the attestation of the Expert of the Polish Philatelic Union, Lesław Schmutz, issued on November 6, 2012:
"The letter from Warsaw to St. Petersburg mailed on May 15, 1862, paid for with the first Polish stamp issued on January 1, 1860, shown in the photograph pasted to the attestation is a genuine postal whole. This stamp, affixed inverted ("upside down"), has the colors: light blue / light crimson, which corresponds to the catalog number Ia. - "light shades." It was cancelled with a four-ring cashier with a one in the center - post office Warsaw. On the lower right part of the letter was imprinted in brownish red a single-ring Russian-language ВАРШАВА 15/5 postmark - with the date of the day and month of the letter's posting. Russian-language broadcasting stamps were stamped on letters sent from the Kingdom of Poland to Russia. In the lower left corner of the letter there is an annotation "fr" - franco (paid), made from an old habit - this is how letters paid in full by the sender were marked in the pre-marking period. On the back of the letter was imprinted the St. Petersburg two-ring receiving stamp С.ПЕТЕРБУРРГЪ III ЧАС. 19 МАЯ 1862.
The attested letter is slightly bent in the middle part, it is in average condition, the condition of the stamp on it is good."
