Below are some cancellations for Beck cover
929 USS Hawkins.
It is believed that
there are AM and PM in existence.
Due to the poor cancellation quality, it is hard to identify and confirm if
the AM cancel really exists.
have a cover with a clear AM cancel, please scan it and email it to Owen
Murray to add to this collector's site.
Thank you for your help.
Here are some more examples
Other Hawkins Covers for Reference