I just posted a dramatic pair of French scissors now 200 years old on my website, along with a couple of the ways to tell French scissors from English or American.
If you are interested in identifying the differences between English, French and American scissors with silver handles, the photos I have posted are a good place to start. Here's what to look for: the shapes of the blades, the general proportion, the style of the silver work, and the finger rings.
It is a fun hobby particularly if you are addicted to scissors, as I am.
www.GayAnnRogers.com, then click on Scissors, then on the thumbnail for Scissors 14.