Gooding #24F1.
Lithographed on strongly colored wove paper, rather thinner than that of the genuine. Most of the stalked pearls in the side frames touch either the inner or outer curved lines of the frame. 

The thin, inner line of the frame, below the value, is broken and incomplete. The "T" of "CENT" has no bottom stroke. The line which marks the red part of the upper lip is too short, and does not go to the end of the profile.

Genuine
Forgery
The stop before "CORREOS" is a good deal nearer the "C" than to the end of the label; and the stop after "CORREOS" is rather nearer to the "S" than to the end of the label. (Similar die as Gooding 21F1, 22F1 and 23F1).

Color Shades

Bartels #C26; Earee - First Forgery; Serrane - Forgery (b); Atlee; Harradine