Subject:

On an envelope except for stamp (the third in the top) on there is a photo of the windmill (pump) decorated by a national flag to celebrating of National days of mills, spent every year by the end of the first decade of May. 

Also the image of a mill is present on special cancellation.

Information about this issue read here please

Tech data: envelope size - 189*101 mm

Typography: N.V.P.H.

Topics: Windmills