The ball nut is the open style holding in place a non-embossed ventilator.  The base rest holes spell out COLEMAN QUICK LITE as seen in the photo gallery below. The lantern is tested functional and has a sizeable dent in the upper shoulder of the fount, which otherwise appears good.  Recent maintenance includes an exterior polish and new R-55 generator reported to have been fired a handful of times. Below the Sunshine logo are the stamped numbers 5  3 which decode to March 1925.