Here is a very old print of the same artist who painted the original ‘Pairs Soap’ girl adverts. Robert A Muller.
I honestly don’t know how old this print is. But it’s got some age to it due to the frame and backing.
My knowledge on old prints is very minimal, but it’s almost certainly pre 1940s and I expect a lot older.
Here are some pictures, so hard to photograph because of the glass but if you fancy it pop in and have a closer look.
I’m open to offers on this one x