Wes, the small proofmark on the left side of the receiver should be a "circle-B" or, a "B" within a circle. The serial number should be between 1 - 5000. Otherwise, the pistol is the same as the Portugese contract pistols of the model 1906. The proof on the side of the Portugese pistol will be a triangle within a circle and stamped in the same place as the proof on the Brazilian. Kenyon notes that the Brazilian contract pistols were used hard and most will reflect that use. The pistol you show seems to bear out that observation.
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