Isle of Man:Mensa 75

In celebration of Mensa's 75th Anniversary, Isle of Man Post Office is honoured to present a collection of six puzzling and provoking stamps reflecting the ethos of the society. Each stamp includes; a brain-teasing puzzle supplied by Mensa, a cypher, a relevant date, a post code relating to Mensa and its history, a GPS coordinate, the name of a Mensa special interest group and a W3W (What3Words), a service that allows users to view a location based purely on the three words searched. .

Issue Description
The collection, which has received Royal Approval from Her Majesty the Queen, was designed by Glazier Design with each stamp featuring word and number puzzles provided by Mensa to amuse and intrigue. These puzzles are a mixture of logic and non-verbal reasoning. The stamps also contain many other secrets – codes, places, messages and words hidden in microtext and cyphers, which are special codes that disguise the words in a message, making the message secret. Codebreakers need to work out the key to solve the cypher. They are all visible on the stamps, but you might need a magnifying glass and code-breaking skills to solve them all.

In a global first, two what3words references to places important to Mensa and locations on the Isle of Man were added. what3words is the simplest way to talk about and share location. The app has divided the world into 57 trillion 3 metre squares and given each square a unique combination of three random words: a what3words address.

The collection was developed in collaboration with Mensa, the organisation for bright people, as it marks its 75th anniversary on October 1st 2021. Mensa is a global organisation with around 145,000 members in roughly 100 countries including the Isle of Man and around the UK. At a time when neurodiversity is more recognised in society, Mensa embodies a sense of togetherness through their motto "Where everyone is different, so no-one is".

First Day Cover
The First Day Cover is a pictorial envelope containing each of the six stamps from the Mensa 75 stamp issue affixed and postmarked.

References & Notes
References