0.50 Peseta Foz-Calanda

Foz-Calanda is a small municipality in the Bajo Aragón district of Teruel province, and like hundreds of Spanish towns it resorted to printing its own fractional currency during the Civil War after the Republic's central government could not keep small-denomination coinage in circulation. These local emergency issues — known collectively as guerra civil municipal notes — were produced under varying degrees of official sanction, often rubber-stamped into legitimacy by whatever local council remained functional.

The Gari Mon catalogue remains the primary reference for this Aragonese material, and the B suffix on #670 typically denotes a variant within the series rather than a distinct emission date.