Sorry to be so long answering this post:
http://forum.purseblog.com/coach-shopping/authenticate-this-coach-694619-600.html#post21492484
It looks like one of the Town Bags from 1989 thru 1991 Lightweight line but without knowing the measurements I can't tell you which one. The regular was about 8x6 and the Large about 12x8.
Thanks, Hyacinth! It is the large one, approx 12 x 8 x 3 with the shoulder strap dropping about 20". Is there a style number?
I will remember to include measurements in future requests. Thanks again!