Steve if you are asking about the clock display it could be down to a standard CD player or an aftermarket with or without the display adapter. On aftermarket without display adapter large clock, with adapter small clock as will give you the data off the player as well.
It's always been a small display even when there was no sterio in it, I've now put a pioneer sat nav screen in and it's still small,JCs is large display on standard head unit terry
Steve is it not an r issue as they did not come with a stereo, maybe the parts are not installed (saving weight)?