The bead in the fount side, at the start of the bottom skirt, is a hold-over from the previous design that used the bead recess to solder-on the bottom. The soldered bottom was replaced by the rim-rolled bottom (we see here) around 1901-1902 by most manufacturers. The bead remained as decoration for several years after losing its function. Dietz started rolled bottoms in 1901, but phased-out the fount bead on the Blizzard in 1912, the HY-LO in 1913 and the Monarch in 1914. I checked my Rochester and it also has the plain rolled bottom. Therefore, I would date these lanterns 1903-1911. Although they used the Rochester name, the real manufacturer is a mystery. It's a great rare find in any case, but finding a Rochester zero globe is way harder than finding two Winfields.