Baldwin Locomotive Works #1200, a Baldwin S-12, built in 1951
I didn't know that the Baldwin Locomotive Works, one of the major builders of steam locomotives in the US, also built diesel-electric locomotives. In fact it turns out they didn't last long in that market. Their small switcher diesel-electric locomotives (like this one) were well regarded but they weren't able to produce a reliable prime mover. They stopped locomotive production in 1956.