The cost of a First Class US postage stamp in 1903 was 2 cents. It was set at this rate in July of 1885. It stayed at that price until November 1917.
The cost for the first ounce of postage in 1913 was 2 cents. It had been at that rate since July 1, 1885.
To many variables. You need to fully identify the stamp you are interested in, some things to figure out: What was the country of issue? Was the stamp canceled in 1913? or does it commemorate something that was made in 1913 and has that date in the design? What condition is the stamp in? Is the stamp used or look like it just came from the post office? Consult a stamp catalog online or at your local library.
Too many variables. You need to fully identify the stamp you are interested in, some things to figure out: What was the country of issue? Was the stamp canceled in 1913? or does it commemorate something that was made in 1913 and has that date in the design? What condition is the stamp in? Is the stamp used or look like it just came from the post office? Consult a stamp catalog online or at your local library.
Without knowing more about the stamp, it's impossible to answer. You need to include the country, date (if you can find it) and what is on the stamp (who or what is on it). Also a rough idea about the cindition would help in pricing the stamp.
One 20th of a dollar
Much Ado About Nothing - 1913 was released on: USA: 2 September 1913
A Much Wanted Baby - 1913 was released on: USA: 28 August 1913
It is worth the cost of the stamp.
how much did a postage stamp cost in 2016
Too Much Parcel Post - 1913 was released on: USA: 9 April 1913
About $2.00
Most stamps will show the value of the stamp somewhere on the design.
a stamp in Montana costs 44cents