Yeah, that does look like a car for the Boy's Train. Makes me wonder about the name "Boy's Train".
Lionel called set 1587S the "Train set for Girls" in the 1957 catalog, sub-titled "in fashion-right colors". Then they felt obligated to show a 2037 freight of regular-production cars on the same pages and titled it "for boys.....a man-sized freight set". Someone must have gotten fired for this blunder.
In 1958 it was titled "Lady Lionel"....still in fashion-right colors. By 1959 it disappeared and was replaced with the General and Military-Space trains.
I don't think Lionel ever called it "the Girl's Train" same with the "Boy's Train" that never made it past prototype status, just names coined by collectors.