Spencer
Spencer,
As I said before when you brought this up here previously... it would look just like the later 654, using the same 4.5 amp motor and single-row brush roll, but when it came from the factory, your cleaner would have had a plain polished belt cover plate and a Magnum Blue outer bag (shake out), meaning that the gray bag and the blue Adjust-O-Rite on yours are replacement parts.
BTW, what specific parts for your 154 are you looking for? Please try to explain this in detail.
~Ben