Looking at mine I'd say it's probably the first (European version) with the Australian three pin plug and socket installed. I've seen others with the US and UK plug designs but the main body is unchanged. At least now I know that there is a version available through Aldi. But given that that company did not impress when I visited their store...
I'm actually surprised Dave hasn't torn down one of the Arlec branded three button power consumption meters, or for that matter the ones from Aldi, which from the available information appear to be a 'generic' model with a wide range of brand names (Ensupra, Green/Blue, Bauhn & EnerGenie, etc) attached.