The NKP was a railroad, and important to any railroad were the locomotives up front that pulled the freight and made the company money.
In our archives we have several NKP Locomotive diagram books and I present several of them here for your perusal. We also have an interesting diagram book for just tenders.
There is a lot of neat information in the books besides the diagrams. For instance, the 1931 book has, pages on renumberings, retirements, locomotives with ATS, etc etc.
NKP Tender Diagram Book - These may just have been clipped from various diagrams since they do not have a typical drawing border. However, I still found them interesting so I am sharing them
Another thing I noticed was in the 1950 book the PA’s were considered 2 unit locomotives.