6c Franklin D. Roosevelt Stamp (1966): How to Identify It

• Subject and series: pictures Franklin D. Roosevelt, part of the Prominent Americans Series honoring individuals who played significant roles in U.S. history.
• Color and perforation: perforation 11 x 10 1/2, printed in gray brown.

The same design was issued in more than one form. Which one you have changes the catalog listing:

• Booklet pane of 8 (Scott 1284b, 1967): Sold bound into a booklet pane of 8 rather than as a full sheet.
• Booklet single (Scott 1284bs, 1966): A single stamp removed from a booklet pane, distinguished from sheet stamps by a straight edge on one or more sides.
• Coil, vertical perf 10 (Scott 1305, 1968): A coil-format version perforated only on the vertical edges at gauge 10.

The earlier Liberty Series 6c value pictures Theodore Roosevelt in carmine; this Prominent Americans 6c value pictures Franklin D. Roosevelt in gray brown. See the 6c Theodore Roosevelt page.

• Measure the perforations with a gauge; the same design often exists in two or three gauges, and that is usually what separates the common one from the scarce one.
• Sheet, coil or booklet: coils have two straight edges on opposite sides; booklet panes have one or two straight edges from the pane edge.
• Tagging: hold it under a longwave UV lamp; tagged and untagged printings of the same design are listed separately.
• Condition (centering, gum, cancel) is a separate question from identification.

Lay the stamp flat on a dark background in daylight, fill the frame, and keep the phone parallel so the perforations are not distorted. Photograph the back too if there is a watermark or gum question. The app reads the design and denomination; the perforation and tagging checks above settle which listing it is.