It's getting so that the disappearing unique signal systems hold as much interest as other objects of particular photos. The searchlights and cantilever certainly spoke "Santa Fe". That said, four axle DC traction was still commonplace just a couple of decades ago as well. Here a pair of LMX units of BN heritage lead a native B23-7 on a 59 car manifest hustling westbound out of Argentine. Fuji Sensia.