COLOMBIA. Banco de la República. 1 Peso Plata. January 1, 1941. P-387.This silver certificate type is in a smaller size format than the 1932 version. Green face and back, but Santander is at the left. B prefix with six-digit number (B439879). Experts consider this quite elusive, especially compared to the 5 Pesos from the series. In high grade it is very rare. This is a beauty and nearly a Gem. Worth far in excess of catalog value.