I just acquired the same machine as yours! It really is beautiful. I've found the same information on my own as has been posted by the users... I've also purchased the manual and it's coming in the mail. Would you be willing to share the information you've collected? So far all I really know is that it was manufactured by Davis before Davis was purchased by White (~1900) -- and I'm not even sure that's right. I'd love to have a date for it!
Also, as you can see in my pictures at the link below, my bobbin winding assembly is different from yours -- as a matter of fact, I haven't found a single picture of a machine with my same assembly! I wonder if mine was added later, or if it's a more primitive model? I'd love to hear your opinions!
https://www.flickr.com/photos/122824553@N02/