The regimental numbering system disappeared in 1881 and at this time, Helmet Plate Centres began to be used as Glengarry badges. For economy reasons, it was decided to use a HPC and a separate gilding metal crown as the Glengarry badge. A blank backing plate was issued to hold both the crown and the HPC together and to ensure they fitted correctly on the headdress (as seen in the picture below).