one of the stamps has two blue spots on back but the rest look great you can see the stuff you lick other then that . ask me other question . I will answer them . ( gum ) is that the stuff you lick so they stick yes - no . I am not a stamp collector. I got a good load of the by a estate sale
Ah.....I see. People are confused because your auction says "10 USED mint stamps" Thats why so many questions, because they cant be used and mint. Just a typo I'm sure! :-)