Rhode Island Tercentenary Issue First Day Cover
300th Anniversary of the Settlement of Rhode Island
Issued on May 4, 1936 in Providence, RI - Scott #777

Rhode Island Tercentenary Commission - Planty #777-18a

The First Day Cover below was signed by the employees of the main Providence P.O. on the face and on the reverse of the envelope.

Sources:
Check List of Rhode Island Post Offices 1790-1994 - Del Beaudreau
Rhode Island Postal History: The Post Offices - Merolla, Jackson & Crowther