Today's crest is the first of the two Royal, and grandest crests which inhabit the fireplace in the office of the Lord Lyon, and belongs to HRH The Duke of Connaught (1850-1942), third son of Queen Victoria. The arms were granted by Royal Warrant and not recorded in the Lyon Register.
The crest is: "a lion statant guardant Or, armed and langued Azure, wearing a prince's coronet, and charged on the chest with a label of three points Argent charged on the centre point with a cross Gules and the two outer ones with a fleur-de-lys Azure".
Here are the Duke's arms expertly-created by the ubiquitous Sodacan on Wiki commons:
By Sodacan This W3C-unspecified vector image was created with Inkscape. - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=11660482
Photograph by Max Marcus