Armenian post of Nagorno-Karabakh
Date of Issue: 21st April 2017
two stamps (2x 400.- AMD)
those two stamps are issued in mini-sheets of 9 stamps
those two stamps are issued in a mini-sheet of 8 stamps (5 of each) + 1 vignette
NOTE : the stamps issued by the Nagorno-Karabakh Republic aren't recognized on an international level, not by the UPU nor by PostEurop.
Those stamps are listed in most stamps catalogues (Gibbons, Yvert & Tellier, Michel) and most Europa stamps collectors collect those stamps even if they aren't official stamp issues.