Motorcycles were a much newer concept in 1937 than they are today. The first "modern" motorcycle was released in 1915, according to the Wikipedia article: http

Motorcycles were a much newer concept in 1937 than they are today. The first "modern" motorcycle was released in 1915, according to the Wikipedia article: https://en.wikipedia.org/wiki/History_of_the_motorcycle#The_First_World_War https://en.wikipedia.org/wiki/History_of_the_motorcycle#The_...