I was wondering if anyone knows exactly what make and model of Vacuum tank this is. I can't find any info on it. It's off the 1928 durant m2, but this durant has a lot of 29 parts. The brackets holding it are Stewart Warner.
As far as I know there are to groups of vacuum systems, one with levers and valves, (the old ones) and those that have a pair of valves without lever. The change has been done arround 1927/8.
If yu remove the lid you will easily find to what group correspond. My guess is that before 1928.