I have returned home from a week's holiday, safe and tired.
I had in my mind an idea to get some stamps while in France and Spain, but in the end there were too many other things to look for. But I did have a mailbox full of postcards awaiting me on my return - 13, in all! (so was glad to see that Viridian's choice was anything we wished for today)
including these two from Belarus. The designer of these "Belarusian Ornament" is Yauheniya Biadonik.
The letter N is 'equal to the surface of a postcard abroad' while the letter M is 'equal to the air mail tariff of a postcard abroad'
Interestingly the 'surface mail' card was mailed on 05/06, while the air mail was postmarked 06/06.
obviously, I don't know how long each took to reach this destination, but they likely arrived within a day of each other.