I don't know if anyone has actually counted, but it is most probably Great Britain's Queen Elizabeth II.
She has ruled England for over 50 years and in that time has appeared on every British stamp issued as well as hundreds of others issued by the members of the British Commonwealth.
The penny black was the worlds first postage stamp in 1840.
penny black
Great Britain issued the first postage stamp in 1840.
A profile bust of Queen Victoria was pictured on the first postage stamp.
The first postage stamp is called the Penny Black. It was issued by Great Britain.
A first class postage stamp is $0.50 or 50 cents.
The first postage stamp was issued by Great Britain on 1 May 1840.
A first class postage stamp is 44 cents.
A First Class postage stamp was 3 cents in 1936.
A first class postage stamp is $0.50 or 50 cents.
George Washington appears on the 2nd postage stamp issued in the US in 1847. Ben Franklin was on the first.
Cost of a postage stamp was dependent on the face value of the stamp and the country. The most common rate stamp is for First Class Mail. In 1989 it was 25 cents for the first ounce.