Very interesting. All I can tell you from the records I've accessed is that this note is from the last printing run of September, 1912, and that these were "delivered to Mexico City, but not issued". By 1916, the revolutionary notes, such as those issued by El Estado de Sonora, were entirely worthless, and with the new Carranza currency almost universally mistrusted and spurned, the monetary (and commercial) situation in the region was descending into chaos. My conjecture (and it is only that) would be that the government in Mexico City, sitting on these Banco de Sonora notes, decided to issue them, or at least prepare them for issuance, as a stopgap measure at a valuation that they thought the populace in Sonora would accept.
Colligo ergo sum




















