A jewel in the crown of old Delaware postcards, itself dated 1906 (from E.C. Kropp) but mailed in 1939 with stamp and clear Dover postmark.  As a bonus, in the message area, it has what looks like a stamp also celebrating the State Capitol, but it’s not a U.S. official stamp, but part of some kind of commemorative set.  Exceptionally, we will not downgrade the card because of that.  Grade: 1