Springfield and Winchester both had the drawing number on their early production gas cylinders. Springfield from June 1940 until early 1941 and Winchester from Dec 1940 until around Oct 1941
RCS, Thank you for the information and pictures.
Veteran US Navy Seabees - US Army Corps of Engineers - American Legion Post 0867
" Only two defining forces have offered to die for me. 1.) Jesus Christ 2.) The American G.I. "One died for your soul, the other for your freedom! "