Issued in Mexico in 1909, this 6 pesos revenue stamp was used for the control of official documents such as patents, direct accounts, and guides ("Patentes, Cont. Directa y Guías"). The inscription notes that the stub ("talón") remained in the tax office, ensuring fiscal control. Printed in a rich violet-brown shade, the stamp features a bold serial number at the top for accounting purposes. Revenue issues like this highlight Mexico’s efforts at the turn of the 20th century to regulate commerce and taxation. A fascinating piece of fiscal history for specialized collectors of Latin American revenues.