My name is ***** ***** I"m happy to help.
There's one part of your question that is a little confusing me. You say, "I have a fiddle passed down to me and would like to know if it could be the same." The same as what?
You wnt to know if the fiddle you have is the one your great grandfather made? I can value it for you, but there is no way to tell who made it without a label inside or other provenance. Do you still want me to value it for you?