Hub Caps - what from?

I've had these hanging about for years - can't remember where from or what for.
Outside diameter about 6 inches
Inside diameter about 5.5 inches

Does anyone recognise them?

Tidy.

 

Early polo I believe

 

Liverpool ?

 

https://www.ebay.co.uk/itm/300898003611

 

That's them.

Thanks

 

to understand how it looks like:



but these rims were mostly used without these outdated chrome caps and only with black center caps:

 

I can’t believe i read the whole sentence then had a think for a moment

 

How old is that wooden rule?

 

Old enough for you to call it a rule !