This is not a 44 tonner like the prototype MTH modeled. The last of the original style 44 tonners were built in about 1956.
Extra 2200 South did a whole series on the 44 tonners, and explained all the phases. If you can find the old issues with that article, it would be worth a read.
Thanks for the tip - I didn't know that! Anyway I was just poking fun at the various mods and remote operation lights hanging off these two lokies. They are still in occasional service, unloading limestone and moving empties around.