I am not certain if we have the boiler from this or the one from OLC 104. As I recall it has the flanged base for the stack as shown in the last photo. Maybe someone else knows for sure which it is. If not I'll take a closer look comparing to photos when I get a chance. We have an additional Heisler boiler which I think I have been told might be from WHEccles #2. It has a number stamped on it's backhead which I take to be an Oregon State inspection serial # from time spent as a stationary boiler which is OR1506.