The V for victory campaign first began from a speech given by the Prime Minister of Belgium in January of 1941. He suggested the use of the V across the world be present everywhere as a show of strength and unity and a constant reminder to the enemy. This was broadcast on the BBC and quickly flourished across Great Britain. Churchill was credited for spreading its popularity. The US began using it to show support and solidarity to Britain and all of the occupied countries world wide. The first use of this propaganda occurred in August 1941 in the form of rubber stamps manufactured in NYC and sold across the country. People stamped their outgoing mail with the V. Also during this time V stickers were displayed in the front windows of homes. As the war progressed the "Vs" could be found everywhere. Store fronts, car windows, lapel pins, and of course, bicycles. After the war there was no need for the campaign and its use dwindled.
Knowing that nearly all bike production ceased in 1942, I assumed the year.