| 1923 Lincoln Porthole…Big Blue $5 Silver Certificate PMG Very Good VG10 The central vignette shows President Lincoln in a ship “Porthole” vignette. This illusion was first mentioned after it was plated in the mid 1920’s – therefore the name. This note is one of the most difficult and very rare. It is the last large size note printed by the U.S. Treasury Department and well known for its big blue numbers and ornate engraving. |