This cache is not at the posted coordinates.
Landline, pushbutton, cellular, cordless, pay, rotary… just a few of the ways that telephones have changed over the years. Some of these phones aren’t really around anymore or are just shells of their former selves. Find one such shell by solving this puzzle.
The final coordinates are at N ABº CD.EFG and W HIJº KL.MNO
A = -4
B = +1
C = -7
D = +7
E = +2
F = -6
G = -5
H = -2
I = -3
J = -2
K = -2
L = +1
M = +1
N = -2
O = +2
NOTE: this cache is accessible between 8am and sunset only.
UPDATE 11/12/21: added a puzzle hint to reflect the rating and a new certitude verification (with apologies to early puzzle solvers!)
You can validate your puzzle solution with certitude.