20 Mil Réis Thesouro Nacional, 10th. Print

Brazil's National Treasury turned to the Banque de France in the early 1900s partly out of dissatisfaction with earlier domestic printing quality, and partly because French intaglio work of this period was genuinely difficult to counterfeit. Duval and Crosbie were a well-matched pairing — Duval's compositional work appearing regularly on French colonial and foreign commissions, Crosbie's engraving precise enough to hold fine detail through repeated handling in a tropical climate where paper degraded quickly.

The "10th Print" designation reflects Brazil's practice of tracking successive print runs within a single authorized series rather than issuing new pick numbers — a bureaucratic distinction that matters more to specialists than casual collectors, but affects rarity estimates significantly between runs.