98¢ for the first ounce for First Class. The US Postal Service sends all First Class via airmail now, there is no cheaper method, and no longer a special airmail rate.
.98
The US domestic rate for an ordinary 1st-class letter was 32 cents in 1996.
It would coast $1.15 for the first ounce.
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.
The First Class Domestic postage rate in the United States in 1939 was three cents.
The current First Class postage rate is 45 cents (since 22 January 2012).
The current US domestic rate for an ordinary 1st-class letter is 44 cents .
The US domestic rate for an ordinary 1st-class letter was 39 cents in Jan. 07.
current us postage
The USPS rate for ordinary domestic 1st-class letters was 39 cents in Feb. 2007.
The postage rate for a standard First Class letter was 44 cents.