FDC

first day of issue cover or first day cover (FDC) is a postage stamp on a cover, postal card or stamped envelope franked on the first day the issue is authorized for use.  Frequently a pictorial cancellation, indicating the city and date where the item was first issued, and “first day of issue” is often used to refer to this postmark.

Fatima Jinnah widely known as Māder-e Millat (“Mother of the Nation”), was a Pakistani politician, dental surgeon, stateswoman, and one of the leading founders of Pakistan.
In 1888, he graduated first in his class from Lake Forest College of Dentistry. In June 1886 he made his first public proposal for the annual observance of the birth of the flag when he wrote an article titled “The Fourteenth of June” in the old Chicago Argus newspaper.
Augusto Coelho e Sauza   (1863 – 1949 ) – His education was first in teaching, but he decided to become dentist and graduated in 1904 as Doctor in dentistry in Rio. He is know as father of Brazilian Dentistry. In 1900 he published hid “Manual Odontologico”, and developed training courses for dental students in 1902. He teached dentistry in several schools.
The figures were modeled by Wood’s sister Nan Wood Graham and their dentist Dr. Byron McKeeby.

USA 1959