1936, Unissued Pablo Arosemena airmail 5 on ½ c., unused with small part gum, scarce, sign. Sanabria (Image)

1930, Airmail overprint proof in red on buff paper, block of four printed on both sides, on reverse somewhat shifted, usual light creases, otherwise fine, in addition mint never hinged block of four of issued stamp, one stamp small tear, otherwise fine (Image)