There is more informative info about the history of the Red Cross labels in the SG British Commonwealth catalogues.
Wow! So there is.
Chapter and verse. Thank you.
I shan't post for fear of copyright infingement.
Printed by Dennison Manufacturing Company, Framington USA
The link is perhaps, Dennisons were manufacturing crepe war bandages at this time. Looks like it may link.
Perfin ID : Blair Stannard, Canada.