The reversed figure 4 has been adopted as the Guildry symbol.
It's a mark of great antiquity, and its adoption is of relatively recent date: otherwise it would have been on the Dean's chain medal , commissioned 1822, instead of the Town's emblem. It was possibly adopted in the middle of the 19th century.
This symbol can be found in many different places in Stirling. In the Holy Rude graveyard the reversed four can be seen on many of the headstones, symbolising merchants in Stirling. On the window of the Church of the Holy Rude it can again be seen, and it is also carved on the chairs in the Guildhall (or Cowane's Hospital as it is also known).
So when you wander around Stirling look above you at some of the carvings on the buildings, on the pavements, in the graveyards, at the Castle and many other places throughout the city and you will see things of interest.