(Azerbaijan) 1923 (11.VI.) registered cover to Baden, Switzerland with Baku registration label on the front, franked on reverse 1921-22 5000r green pair in combination with Transcaucasian Federation Russia 35k. and two pairs of 1r. with star overprint, tied by Baku cds, arrival cancel to side; some slight creasing.
1923 Registered cover from Baku to Rostov on Don, franked on reverse with 4x15,000R (block of four) + 5x500,000R (block of four & single) Transcaucasian Federation Mount Ararat & Oilfield September 1923 issue all cancelled by “BAKU 28.11.23” scarce serial “θ”, alongside arrival Rostov.