I would guess it's from the early 1900's. To me this thing just screams that it's 'the first Rock n' Roll guitar ever, with its cool rectangle shape and its outlaw looking stance. I know this must have been a site to see someone when they played this guitar. I would love to learn more about the person who built it. It must have taken a lot of effort back then, it looks really well made.
This homemade guitar would be great for playing some depth down south slide Bottleneck Blues.
I left the photos full size, you can click them to see the large full up close shots.