There is a poor quality scan of the original patent application available through the Google Patents web site. It is Design Patent D012890 (or maybe D0012890). It shows the complete alphabet, numbers and punctuation.
[EDIT] — Don’t bother looking for the scan. I just checked it online and the quality is so poor it is unusable. It looked better on the paper copy I had from the original library disk made years ago — but even that isn’t really suitable.
It is a xerox of a laser printed copy printed directly from the USPTO disks which used to be available at any US Library which is a government records repository. They had complete collections on DVD (proprietary format, I think) provided by the USPTO of the scans from the original patent papers. Some patent drawings have disappeared over the years so are still missing. Those same DVDs are available at certain regional government repositories also.