Mystery Cello 1670?

[Mike Weems]

I know this is a bass forum but I have this cello and since cellos are double bass's little brother I thought someone here may be able to help me ID it. this is the state this cello was in when I received it and I have been moving it from place to place for the last 20 years. decided to do something with it. I had a Hamm violin of similar construction 1830's. It dose have a date of 1670 written on the back in what looks like lead. Any help would be greatly appreciated.