RSFSR. TSSR. Postal order sent from Baku on September 26, 1923.

Postal order form at the sum of 4500 rubles, sent from Baku (Transcaucasian SSR) to Armavir (RSFSR).
It was received on September 29, 1923, handed to a receiver on October 02, 1923. Form hasn't been paid by the stamps of Transcaucasian SSR in Baku because there were no stamps of TSSR. When the postal order arrived in Arvamir, it was paid by RSFSR stamps at the sum of 62 rubles.
It is the only postal order form of Transcaucasian Republic, paid with RSFSR stamps, which is known at the present time. Very rare.