The owner of N1553R lives in Hilo, Hi. It took me a while though, to see what some suspicious people could complain about.
I wish I would have kept the picture, the # could have been N1663R but when I saw the picture I could see what they were talking about. My brother in law is a helicopter pilot for the LASD and took a picture of the plane at an airport in LA.
Which database did you use? The official FAA registry says it is invalid.
However, I did find it at airframes.org for a Grumman AA-1B, albeit without an address.