For those who are interested in collecting mold number and year variations!
I have the following duplicates (mold year, year of manufacture, and mold number) available for trade --
1938 1947 19
I am interested in any mold numbers, or years that I do not have. The current list of what I have is here --> [http://myinsulators.com/ajg/Baby%20Signal%20Mold-Years.pdf]. This includes mold numbers and years of manufacture from Hemingray as well as other manufacturers, and shop numbers too!