84 or 85, I would say, unless distribution was different in Australia, which I doubt. Photos of the pickups might possibly enable us to narrow that down, if you feel like removing the scratchplate, but it hardly matters really. It looks like a typical 84/5 Goldie.
Springys were Tokai's first proper vintage copy Strat, & they were made from 78 to 82. They had the decal that looked exactly like Fender's from a few feet away, and this was one of the many things that led to the over-quoted lawsuits.
In 83 Tokai switched to a block decal (look in the Registry for details), and in late 83/early 84 they brought out the Goldstar, with a decal that was a less blatant copy of Fender's. There is little, if any, difference between an 82 Springy ST50 and an 84 Goldie ST50. They do seem to have used ash more for the bodies on higher model Springys, whereas Goldies were alder, and the pickups changed a little over the years, and depending on the models, but Springys and Goldies are fundamentally the same.
You tend to pay an extra ?100 or so for a Springy, partly because the cooler decal makes them more desirable, partly because Goldies seem far more common - they seem to have made an awful lot of Goldies (mainly ST50s) in a couple of years around 84/85. So Goldies are likely to always be worth less, even though they are just as good. The best value Strats you can buy, as I have said many times.