U CAN’T TOUCH THIS
Cache is not at the posted coordinates. To figure out where the cache is located, you must first solve the puzzle below. As always, enjoy.
N38 40.ABC
A. Stop signs originated in Michigan in 191(A) -2.
B. Manual on Uniform Traffic Control Devices or MUTCD stop sign specifications were altered (B) times between 1935 and 1971, mostly dealing with its reflectorization and its mounting height.
C. The unique gavel of the United States Senate has an hourglass shape and no handle. The gavel in current use was presented to the Senate by the Republic of India and first used on November (C)7, 1954. This gavel replaced an ivory gavel that had been in use since at least 1789 and had deteriorated over the years.
W121 15.DEF
D. In 19(D)6, the U.S. Post Office issued a John Henry 32-cent postage stamp. It was part of a set honoring American folk heroes that included Paul Bunyan, Pecos Bill and Casey at the Bat.
E. Release date for the single Time by Pink Floyd first digit +1 = (E).
F. Sidereal time is the measurement of time relative to a distant star (instead of solar time that is relative to the sun). It is used in astronomy to predict when a star will be overhead. Due to the orbit of the earth around the sun a sidereal day is (F) minutes (1/366th) less than a solar day.

You can validate your puzzle solution with certitude.