FYI: There are some slight variations of the #42 loco between the earlier MFG era (1914-18) and the later Corp era (1920's).
MFG loco will have a single motor, triple steps, a sliding door and perforated screens on the ends. Usually a single band around the NYC logo stamping. Earliest examples may have turned hand rail stanchions.
Corp era #42 locos usually have twin motors, single step, double stripes around the NYC logos and embossed LIONEL CORP plates on the ends.
Of course, there are anomalous variations.
A couple of photos would help date your loco.
