Announced November 1, 2022:

The Mississippi River is variously referred to as America’s backbone, heart and soul. The Mighty Mississippi release honors the big river with a portfolio of 10 photographic stamps, each representing a state along its course. On the back of the pane is a map of the central United States, detailing the river and its major tributaries. Art director Ethel Kessler designed the pane using existing photographs.

Additional information will be posted below the line, with the newest at the top.

Updated July 5^th:
Here are the Scott catalogue numbers for this issue:
5698 Mighty Mississippi pane of 10
a. (58¢) Minnesota
b. (58¢) Wisconsin
c. (58¢) Iowa
d. (58¢) Illinois
e. (58¢) Missouri
f. (58¢) Kentucky
g. (58¢) Arkansas
h. (58¢) Tennessee
i. (58¢) Louisiana
j. (58¢) Mississippi
k. As #5698a, imperforate
l. As #5698b, imperforate
m. As #5698c, imperforate
n. As #5698d, imperforate
o. As #5698e, imperforate
p. As #5698f, imperforate
q. As #5698g, imperforate
r. As #5698h, imperforate
s. As #5698i, imperforate
t. As #5698j, imperforate