Our house was built in 1956. I am trying to replace the plate , and receptical outside but don't know how to remove the plate. I have asked guys at work, and the big box DIY stores with no luck. I will do my best to describe it. It has a single round cover that turns and locks in place with one turn and when you look at it there is only one push (just found that out on my own) button as some kind of release but that is all I see. I have been prying at it with no luck. Has anyone run into this kind of plate before, and can anyone offer some help?????