13c John F. Kennedy Stamp (1967): How to Identify It

• Portrait source: the image of Kennedy is based on a photo taken by Jacque Loew, used in the book The Kennedy Years.
• Postal rate covered: paid the rate for a foreign letter or for an airmail postcard.

The 13-cent Prominent Americans stamp pictures John F. Kennedy in brown; a completely different 13-cent stamp -- the Liberty Bell -- belongs to the later Americana series and does not picture a person at all. See the 13c Liberty Bell 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.