That is the F stamp and came out in 1991. It has a face value of 29 cents.
A first-class stamp is not the same as a forever stamp. A forever stamp holds the value of a first-class stamp regardless of how often the rate for first-class postage has increased. A first-class stamp only holds its face value.
It is a forever stamp. It is good for the current value of a first class stamp.
That stamp was issued in 2005. It has a face value of 25 cents.
First Class is 44 cents
A first class stamp is 44 cents as of 2010.
The tulip stamp was marked as the F Flower stamp. It has a face value of 29 cents.
4cents
On 12 May 2008 the First Class Postage Rate was increased to 42 cents.
44 cents as of 2009
A postcard stamp looks like a first class stamp, only it has a smaller value. The size of the stamp is one inch by one inch.
They are not the same stamps. The ones maked First Class were for a specific postal rate, you would have to specify which one. The FOREVER stamps are valid at the first class rate regardless of what it is.
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.