I have an original etching by Louis Breton titled "Bridge in Vernon France.
Would like to know more about this etching and its possible value.

There are a few of these around. The value will have everything to do with the condition of the paper and or framing. If it's not discolored of damaged in any way, and if it looks like a frame from the thirties (when he was working) It's value will be around 150. - 300. dollars. Hope this helps you. JayG