The Vickers AA is a very useful model as it was exported to many countries as the M1931, Turkey had 48 delivered before WW2 for example. Romania had well over 150 of them.
As far as is known, no AP round was made for this gun by Vickers, but Romania did make one for their licence built M36 guns from mid 1942, with a respectable 8cm/1750m/90* armour penetration, maximum 11cm/300m/90*