StampNews.com is glad to inform that Belgium Post put into circulation sheet of five stamps that is called Optical Illusions. The issue was released and became available for purchasing on the 27th of October.
Belgium’s postal administration, Bpost, urges everyone to look closely at the stamps because the designs may reveal something one did not see at first glance.
The descriptions of the stamps provide some clues. Starting on the left, the stamps are described as showing still-life with clown, count the pencils, cubes in motion, key in profile and find the number.
The postal administration reports that it will provide the answers in its yearbook of 2014 stamps.