It helps when asking about a postal history item if you show a scan of the complete front and back of the item along with a closeup of the stamp(s). The origin, destination and dates all come into play along with all markings that may be present.
In this case being able to see the postmark date might help narrow down which Catalog number your stamps are without knowing if they are watermarked or not. That being said there are not many options for these workhorse stamps from the period of 1902 through the first world war.
Either Scott 67 or 82 are choices and each on cover as singles have a catalog value of around $2. As I said, seeing the entire cover might add more interest and value to someone. You could expect an ordinary cover of this type to sell for $1 give or take on
ebay.