Safari - displaying old pages
I recently visited a website under construction. Now the website has been completed when I visit the site it is still displaying old page info. I have cleared the cache. I have quit Safari, but still no joy. Chrome and Firefox are fine. Safari is fine on my iPad and iPhone - but the correct page info/layout will not display on the iMac. I don't have the "Reset Safari" option in the Safari drop down.
How do i see the latest page info?
PS. My customer has the same issue on her iMac
iMac, macOS Sierra (10.12.1)