Dave it was the first J3a, 5444. It was cataloged with Boxpoks like the prototype but shipped with Scullins. After the uproar they offered a set of Boxpoks for those that wanted to swap drivers. A few years later 5433 in the Anniversary set came with Boxpoks.
https://www.railarchive.net/ny...tion/nyc5444_tdr.htm
https://www.railarchive.net/ny...on/nyc5433_nowak.htm
Pete
Pete, you come through again(and I believe as well you were the one that pointed this out to me the first time). What is really funny, I was explaining disc drivers and some of the stuff that I have come to know via being told by you, Pat, Rich Melvin, Hot Water, and probably a handful of others to one of the engineers(not the operating ones, the measure, diagnose, and such ones) today. I said in my limited knowledge that people like Pat & Pete would be able to explain exactly the differences between J1's, J2's, & J3's.
What was really interesting is that the engineer Bryan was really taken with my explanations of steam engines, diesels, how some things work between the two types(I described something Rich had told me about 765 pulling cars with a diesel, and the diesel pulling the cars with 765 just operating enough to not burden the diesel), and some of the changes from early steam to later steam. I had told him that if he wanted to take in a good steam experience, pop over to Strasburg. What was even more interesting, is that Bryan does want to pop out by Lancaster to take in some things that he has heard about, so maybe he will have some railroading fun. He's a good fellow.