I wonder if that #1 Rocket was the engine that they had chrome plated in the early 1900s (1905¿?/1910?¿) I guess that one had inspired this Lionel.
Either way, I never considered that "Rocket" name may have been an mid 19th century name.
I just never considered it would have been coined in the mid 1900s for flying fireworks type rockets 🎇🎆 vs 20th century metal rockets/bombs 🚀 which I assumed was the inspiration.