All coming together now. Yes, that is a century base from the americas. Looks like is was re-wired for Australia, where you reside. So it would take one of your standard Aussie bulb bases, does look smaller than what should go in there. E14, not sure what your standard bulb size if over there or wattage for that matter. Good luck with your hunt. If it is a higher wattage bulb, might need to run it through a dimmer as not to burn the wax over time.
PS: Welcome to your new addiction! Have fun and enjoy!