1878, 50c buff, second printing plate, very thin wove paper, good margins all around, used with a bogus "Paid" cancel; despite the counterfeited usage, the stamp is genuine and extremely rare with less than 20 examples recorded; signed Darteyre and accompanied by an extensive report on this example by James B. Helme (1989), then stating only ten examples of this value to exist. (Image)

1881, Colombia 1c green, strip of three displaying clear to mostly large margins, cancelled by bluish black "Panamá" oval handstamps, small corner creases at lower right; a rare multiple of this low denomination. (Image)