Hiya, it might be EPA1 (?)
If so, the EP stands for Electroplated (as Brinjal has correctly noted) and the A1 will be the makers Standard Mark - for example A1 = the highest quality, A2 = not quite the best standard etc
Some spoons do however have the EPAI on, but other the Iridium, I can't see what metal the I could stand for. Electroplated Australian Iridium? Possibly Electroplated Aluminium Isolate - But I'm just clutching at spoons now... There are a few Scottish ones with with EPAI on too... hmmm....