1990 - Great American Series - Luis Munoz Marin - Includes 4 Stamps

5-cent U.S. postage stamp featuring Luis Muñoz Marín, the first democratically elected Governor of Puerto Rico.

Stamp Series: This stamp belongs to the "Great Americans Series" and was issued on February 18, 1990.

Significance: It was the first stamp in the Great Americans Series to include additional biographical information about the honoree within the design and selvage, and the first stamp under 10 cents to display a zero in front of the denomination.

Purpose: The 5-cent denomination was considered "change maker" postage, useful for making up various rates for third-class parcel post and for adjusting postage when first-class rates increased before new stamps could be released.

Design: The stamp features a portrait of Luis Muñoz Marín with the words "Governor, Puerto Rico" below it.