Thanks to all your replies. Unfortunately, I am not near my bikes as I write so I discuss from my memory. Based on a review of all the information and picture, I can pretty much say with assurity that I have a Standard American.
In the picture of the head tube(s), I saw the screw holes and visualized it with a mounted badge. Based on the area from each edge of the badge to the end is the tube, I would approximate 1" - 1 1/2" each way with a standard frame. I could visualize quite a bit more tube from badge edge-to-tube edge on the King-Size frame which my American does not have. My American also has a color/white seat. I also have a Twinn tandem which I believe uses heavy-duty spokes. The spoke on my American are thinner and more resemble other non-specialized middleweights.
Nevertheless, this bike is exceptionally nice, very well-kept and just a tire replacement away from being back to original. Very happy with it and probably the nicest original in my collection.
I'm sure I'll have more questions as I go along....thanks for all the replies.