This came from the depths of memory but I have no idea how it got there, oops. https://helmets.org/history.htm https://helmets.org/history.htm suggests the firs

This came from the depths of memory but I have no idea how it got there, oops. https://helmets.org/history.htm https://helmets.org/history.htm suggests the first standard for bike helmets was in 1970?