Nice deep cabinet toned AU well struck and preserved for the type.

Mexico (Republic) 
PeriodFederal Republic (1823-1905)
1870
Silver (.903)
Weight27.073 g
Diameter37 mm
ShapeRound
OrientationCoin alignment ↑↓
DemonetizedYes
ReferencesKM# 408
Obverse
National arms; eagle with snake in beak standing on cactus in the middle of lake. With legend at top and oak and laurel wreath at bottom. With date under it.

Lettering: 
REPUBLICA MEXICANA
1870

Translation: 
Mexican Republic
1870

Reverse
Scales of justice with radiant liberty cap at top, and law scroll below crossed by sword. With value, mint, assayer's initial and fineness at bottom.

Lettering: 
LIBERTAD
LEY
UN PESO Cn E 902.7

Translation: 
Liberty
Law
1 Peso, Culiacan.9027

Edge
Reeded