face value - 41c
41 pence
These are 42 cents at present.
US postage rate increases -- for ordinary first class letters . June, 1932 up to 3 cents from 2 cents. July, 1958 up to 4 cents Jan , 1963 up to 5 cents July, 1968 up to 6 cents May, 1971 up to 8...
Taking into account labor and materials, about 3 cents per sheet. But you'll have to pay 41 cents per stamp these days.
42 cents is the 2008 rate. The rate went up on May 12 from 41 cents. You can check the USPS web site for a history of the rates and the current rates.