Here's another banjo- I think this one is interesting. It has a lot of Buckbee-like features, but the neck is connected to the rim with three screws, not two. It also only has six brackets. The fewest I've seen on a Buckbee is four, and that banjo had a later 19th century style headsdtock and frets.
I'm thinking this one is 1860s-1870s, but I'm not entirely sure. Could it be older but with replaced brackets? Check out that neck carve and those pegs!
It Could possibly be from that time frame. I did notice that the dowel extends through the rim, allowing the tailpiece to be attached, which is a common feature for most minstrel-era banjos of the 1850's-1860's.
Is the head signed? I can see something that looks like it in the picture.
The head is signed in two places, one saying "Charles Wayne Benson" and the other saying "Charles Wayne". The pot diameter is 11-3/8".