They are U.S. Navy Submarine Stamps.

I have also included 2 Extra Single Gato Class Submarine Stamps.

All are in Mint Never Been Hinged Condition.  From my own personal stamp collection.

One Gato Single is a little bit Wrinkled from having been taken from my stamp collection book.

Otherwise, then that they are all in F/VF condition.  Non-Smoking Household.