Watch List notes:

M2331b – 20 Centavos Guadalajara, Jalisco 1915. XF+. 110 x 54 mm. Serie F. Impreso por José María Ynguíniz por el decreto del 29 de mayo de 1915, sin número de serie, bordes manchados, un doblez poco notable a simple vista

ENGLISH:
110 x 54 mm. Series F. Printed by José María Ynguíniz by the decree of May 29, 1915, without serial number, stained edges, a fold not very noticeable to the naked eye.