From my website stampscoinsnotes.com. The meanings of mint marks on coins from different countries.

Germany

A – Berlin
D – Munich
E – Muldenhutten
F – Stuttgart
G – Karlsruhe
J – Hamburg

Mexico

A – Alamos
AS – Alamos
C – Culiacan
CA – Chihuahua
CE – Real de Catorce
CH – Chihuahua
Cn – Culiacan
D – Durango
Do – Durango
G – Guanajuato
Ga – Guadalajara
GC – Guadeloupe y Calvo
Go – Guanajuato
H – Hermosillo
Ho – Hermosillo
M – Mexico City
Mo – Mexico City
O – Oaxaca
OA – Oaxaca
P – San Luis Potosi
PI – San Luis Potosi
SLP – San Luis Potosi
Z – Zacatecas
Zs – Zacatecas

United Kingdom

H – Heaton
KN – King’s Norton

United States

C – Charlotte
CC – Carson City
D – Denver
O – New Orleans
P – Philadelphia
S – San Francisco
W – West Point