The cover includes two 2008 John Quincy Adams Presidential Dollar coins, one from the Philadelphia Mint and one from the Denver Mint. These come on a custom display card featuring a portrait of the former president and one of the four 42 cent 24/7 stamps. The postmark on the stamp will be May 15, 2008, Quincy, MA.
The overall production for the cover is limited to 50,000 units. The Mint has placed an initial limit of 10 units per household. The price for each cover has been set at $14.95.
The product page for this new offering can be found here, although ordering won’t be available until the official start of sales.
The previously released covers for James Madison and James Monroe are still available for sale at the Mint. The earlier presidents have sold out.