Around 30 years ago while I was assigned to a location just outside Philly, I encountered a 2344C NYC "B" unit at a hobby shop for a very cheap price. Knowing that the B is more rare than the A units I picked it up with the expectation that I would eventually buy the AA to go with it. Well, life intervenes as we all know and that never happened but I carried that B around through 8 or 9 more moves and just this October, for my birthday, my wife bought me the matching AA units. They run like champs and pull like mad. They are the 1950 ish vintage 2344's with the "chicken wire" vents which just happened (circumstance) to match my B that I have been moving around the country for 30 years. So that I my piece of Postwar Paradise today.