Something like:
Acer palmatum 'Murasaki kiyohime or Kiyohime

Adding yatsubusa to the end of the name really only indicates the overall size and growth habit of the variety as in the yatsubusa form or Kiyohime for example. I think the two names above will get you on the right track.

MJH

I looked up your kind suggestion, MJH (sorry not to respond sooner; I made posts on a couple of sites to get info).
The photos I found for kiyohime seem to have light green leaves, where my specimen's leaves are darke green, and not 'dipped' in red, but rather lined with a reddish edge. to I realize I need to give more info to my description beyond the photos:
The leaves, when mature, are darker green than in the photos. The largest leaves are 1 3/4" from base of leaf to tip, have slightly serrated edges, and a bit of dark red along the edges as well. The new leaves are bright red, with a light green emanating from the centers.The young branches are very glossy dark red. The trunk is smooth, and greenish grey.

I guess I will find out more when i see the autumn habits?