I asked Chris, the Palmer collector for some info on this to try and help you out on your mission.
"Palmer made a line of about 6 designs for Brunswick "Brunswick by Palmer" in the 1970's, with the top of the line cue being the Lord Brunswick. They were a small production line with the cues being sold in Brunswick's dealer showrooms. The line was pretty expensive by the time the margins were put on for the dealer and didn't really take on."
Chris also ball parked the value around 600-700 if the cue was straight with two shafts, but said it was hard to calculate since they do not come up for sale very often.
So on to my assumptions. I'm guessing this has one shaft. You said 95% so I guess straight, with maybe a small ding or something somewhere.
If Mint with two is 600-700, I'm taking a stab with, 1 shaft @ 95% would be somewhere in the range of 400-550 depending on the buyer.
Hope I was able to help.