PORTO. 5% 1 Obrigaçao de 100$000 Rs. B/S Cat. 740 B. green, brown, buff. No 10507. Folds, large format. For story, see previous lot. This is however a bond, with a completely different design. It shows, we believe, the church Igreja dos Grilos on top of a hill in the historic centre of the city, which in itself is shown on the top part of the bond. Also vignette of a tram. Probably 2-3 pieces known and not been in the market since several decades.