Thanks for the opinion, the shorter arm seems to be right at the 3 13/16" length.
I want to get a new crank cover and handle and see they are available in two shades of bronze. Which shade do you think most matches the original, builder's-installed window shade? I can't get a true feeling for which bronze shade is the correct match. Dark bronze may be the closest match?
Caradco often used the dark bronze, so I believe that that may be your best chance.