One coupler is a simple post, and the other coupler is a pincher or claw that tightly grabs the adjacent post. Marx train set Date and Locomotive? Lastly, I have a plastic tender car that is black with the lettering "New York Central" on the side. Good luck! The Marx name itself has changed hands several times as well. Locomotives -- model numbers in parentheses do not appear on piece. I didn't get additional Marx items as a child.
Examining even small parts, such as tongue-and-groove couplers a style of train-car connector made by Marx starting incan help date a train.
Marx couplers explained
Freight Cars: By that time, the value of Marx toys and play sets had skyrocketed in the collector markets, which in turn triggered a demand for the toys to be reissued. Additionally Marx often did not place catalog numbers on many trains. His brother David decided to join him a couple of years later. All of the train makers wanted a coupler design that could automatically couple or uncouple to improve play value. This design lasted until Marx was the largest toy manufacturer in the world by the 's.