Can anyone help with these C15TA markings ?

[James Gosling]

Can Anyone help with these markings? They are of a C15TA, I believe belonging to the LAD detachment of HQ Squadron 1st CACR. The 79th Bull's head is in the centre with the 31st armoured brigade sign beside it. The Regimental 157 however appears to have been painted over another sign , possibly 1st Canadian Army.Firstly can anyone confirm this and secondly would the vehicle have carried another sign on the other wing ?
Any help would be greatly appreciated.