Petrol prices in years gone by

Derv is diesel.
Shell as far as I know is always a white shell.
I think Fina used to be blue but not sure they used a shell.

Could the one shilling be advertising something else on the pump.

 

No I don't think so, or it would have said what it was advertising, but it was just a sign saying 1/- on the front of the pump. It was quite big.
Maybe it was there from many years before, the garage was old. When the price went up the 1/- sign disappeared but the petrol was 1/6 and then half a crown. I can remember it.

And I remember a blue glass shell with 'SHELL' written in red on it.