Hey Guys,
From April, 1942 until Sept., 1944 U.S. government bicycle regulations ( Limitation Order L-52 ) did not permit new bicycles to be sold to the public with chain guards or stands, which of course was due to wartime metal rationing. So during this period any chain guards and stands used were from pre April 1942 production not from the factory new bikes ( Say, Mr. Smith obtained a new Columbia lightweight through the rationing program to use in getting to his war production job that bike would have been received by him without chain guard or stand. However, he may attach and old chain guard and/or stand that was laying around ). As of Sept., 1944 the regulations were changed to allow new bikes to be sold with chain guards and stands as long as the addition of these components did not have a negative impact on war production contracts. Also, in regards to chain guards and stands the restrictions only pertained to civilian use bicycles. U.S. Military use bicycles were allowed to be produced and delivered with chain guards and stands.
Regards,
Bill