I have an old B&W television i am told is in working condition, however the power plug is missing...

its an configuration i have never seen before (see attachment)

i wondered if anyone has seen this before or knows the name for it so i can try and source a cable for it, obviously as i am in australia it would have to be a 220,240v one....unless they just had a standard one they used everywhere?

I am new to old telly collecting, i normally only collect the tv studio cameras

Can you tell us what brand TV it is?
I know HMV used a special lead for a time but I have not seen one in person for many years so I can't say if it's the same.

its an "ASTOR" brand television

(see attached photo)

It is not a standard socket that is available any more. You may eventually find the correct lead if you're lucky. In the meantime you may need to make up a connector to fit.