Is a lithograph signed by Harmon Montgomery worth anything?

I would say of course it's worth something, it's a matter of a few variables for instance how large was the printing, is it a signed edition and of course is the artist at one time popular and sad to say usually popular dead artists works go up in value right after the time of demise. Do your research, or send me a photo and I will be glad to help you find out the worth of your prints.