I agree with Chuck's summary of Colnago ushering in a era of painted graphics instead of decals and others following, especially as the graphics got more elaborate. However, some others besides Herse and Legnano were hand painting the name prior to '83. I'm guessing this Colin Laing to be from the early 70's:
Not only is the name painted on the down tube (no stenciling used here either), but the apparent client's name and Colin's signature are also hand painted (see other pix).
Special thanks to Morgan Fletcher for allowing me to post these pix to his great site.