There have been several non-denominated flag stamps. They were used to cover increases in postal rates when they weren't sure how much would be authorized. Check the US Postal web site for specific pictures to match up with the one you have.
No, it is not a Forever Stamp.
A. H. Stamp has written: 'Penrhyn Bay'
I checked with our post office in alabama and they said the value of the H makeup stamp with USA and rooster weather vane is one cent and they are still usable.
It has a face value of one cent. It is not very rare and you can by a copy for the minimum stamp fee of about 20 cents.
H make up rate stamp is valued at 1 cent. They were made because they didn't know if the rate increase would be 1 or 2 cents. The 'Make Up Rate' stamp was designed to be used with the existing 1st Class stamps.
Look for the words 'The "H" Rate make up stamp." It has a picture of a rooster on a weather vane.
The H stamp was the one with the Hat on it. It has a face value of 33 cents.
It will depend on how much of a misprint it is. The face value is 33 cents. A simple mis-print is more of an oddity and might be sold to a collector for a dollar or two.
The H stamp has a value of 33 cents toward postage. The H Make-up stamps are worth 1 cent. Both are valid for postage within the US at that value.
Scott Number 3260. These are the first class stamps. They have a face value of 33 cents. They are still valid for postage within the US for 33 cents.
The value of the "H" Rate First Class stamp is 33¢ as per official United States Post Office information. The "H" Rate Make Up Rate stamp is 1¢. Check for the additional wording so that you know which one you have.
The H stamp is worth 33 cents. Yes, you can add a 1 cent stamp to cover 34 cents worth of postage.