I checked my above pictured powerpoint, and the manufacturer actually crisscrossed the internal connections so the hot and neutral pins are consistent for both outlets. Not like the adapters which reversed active and neutral.

Yes , mirror-reverse double adaptors were made that way to reduce costs and in any product that usually means putting lives at risk. They were banned a long long time ago, certainly before I was born. It was a trainwreck of an idea to offer them for sale in the first place, given that Australia lead the way with regulations for fixed wiring from a very early time.

and as my Aussie radios all have power transformers, they don't care.

Shouldn't be a problem. This is how most portable inverters work, where there is 2 x 120 volts, 180 degrees out of phase to give 240 volts.

Try here:
Classic Switches


Peter

Try here:

Classic Switches

Peter

The good thing about those switches is that they are made by Clipsal and HPM and thus meet current standards. The square mounting blocks don't look authentic though, as mentioned before accessories installed by themselves were most often installed on a circular block though Clipsal do make these so it is worth chasing them.

Clipsal also make a matching surface switch base that takes standard press-in accessories such as normal switch dollies, TV antenna sockets, dimmer and neon mechanisms, RJ45 sockets and the like.

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Nice but I should have gone a different way.
This whole setup could potentially be just a 12 volt relay switch,
and that way there would not be any cord needed out of the block
other than the false radio mains lead, and that could be the plain brown figure 8 cable.
ie. the unsafe mains cable you see is just the cable for a low voltage switch,
then hidden away is a relay in a box near the real mains cord which is hidden.

That's a cool duplex type 'I' receptacle Wa2ise, never seen one, only singles, very rare.

Just today I saw that bakelite double adapter in an antique store near me for $10.
I suppose I should have tell them about the reversing of pins,
but was thinking about whether to buy it just since it's an oddity.
My first bakelite adapter was only 50 cents from the Salvos, and that's a proper one.

I would have made this powerpoint like this:

Thus both sockets are consistent in which pins are hot, neutral and earth.

QUOTE: That's a cool duplex type 'I' receptacle Wa2ise, never seen one...

I'm probably a bit tired but that double adapter looks like it reverses both the active and neutral for both sockets.

Looks right, but is some photographic fakery