Regarding the use of the Round Date (controlled by the Postal Operations Manuel and similar federal regulations) there are relevant court cases. One is at http://www.paed.uscourts.gov/documents/opinions/02D0745P.pdf where the court said: (“internal regulations of the post office, such as those found in the Postal Operations Manual, lack the force of law and their violation does not show negligence per se.”) which is true. They are strictly for the administrative purposes of operating the post office. Other regulations such as those found in the Domestic Mail Manual tell the public how to use the post office, so that general statement is not exactly correct regarding the DMM ~ check with your lawyer first eh ~ pay your postage and you should be OK. Point here being there’s really no law to point to regarding the correct structure of the postal obliterator used to mark that draft registration form.
you are talking about postal regulation not Selective Service Regulations, apples and oranges...negligence per se is not premeditated forgery....proof is available to prove or disprove forgery all it needs is to be investigated...just like the original BC..