Contributors to the Cause Of American Independence 1776 – Continental Military Services. American Independence Fighters & Great Hero Folios Of 1776 Era (Produced In Association With Sunoco Oil, The Us Postal Service & The American Revolution Bicentennial Administration ). Sunoco Folios ( 8 Sides With Block Of 4 Genuine USA Stamps Depicting – ‘Contributors To The Cause’ – In New Condition. Each Measures Approximately 8 1/2 X 11 Inches.