The only ones I can think of with purple writing and that combination of numbers would be Panasonic Os-Con caps.
Here's a list at mouser
Os-Con where you will see the purple with the combination of layout.
First line - Lot Number
Second Line - Series (I couldn't find PC, but I found SVPC)?
Third Line - Capacitance (ie 330uF)
Fourth Line - Voltage , where 6 = 6.3V