Hey George, Welcome to the Stovebolt page. It is great to have another Art Deco owner on here.
There are no numbers stamped anywhere else on the frame.
You may want to make sure the Engine number is not on the title. Some of the old stuff used that # too. Your engine # is found on the nice smooth section underneath the distrib. It should start with DBA or similar if you still have a 1946 (late) 216.
I think there are places you can purchase the serial number tags. Check the links section and scour the vendors...otherwise, someone will be along in a few minutes to tell you where to get one.
