Four of these are available.  One was mailed in 2012 with two very large stamps and full, large Ekaterinburg postmark.  The writing extends on to the stamps, though (Grade: 3, $3).  Two were mailed in 2013, each with stamp and postmark.  One of them has a blurred purple airmail chop (Grade: 1, $4) and the other has a smaller stamp with no extra chop (Grade: 1, $3).   Finally, one more was mailed in 2014, with one large stamp adjoining the B&W pre-printed postage; also a full Moscow postmark (Grade: 1, $4).