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

Unofficial Town Cancel - Harmony, RI 
Rhode Island Tercentenary Commission - Planty #777-18

The Harmony Post Office, (Glocester Township, Providence County) was established on December 3, 1855 under Postmaster Albert E. Steere. This post office is currently in operation. The post office is located at 391 Putnam Pike and the current Postmaster is Roberta E. Lisker-Goldsmith appointed on January 27, 1979.

Albert E. Steere was born on October 15, 1822 in Glocester to Jesse Steere and Barbara Tourtellot. He is descended from John Steere born in 1634 in Oakley, Surrey, England, (died in Providence August 27, 1724). Albert was married to Hannah McLoughlin in 1845 and they had 5 children. Albert died in Glocester on December 14, 1859.

Collins is a cachet maker who produces Hand Painted cachets for First Day of Issue Covers. They usually produce covers with two first day cancels; the second cancel relating to the subject matter of the stamp issue. Collins produced a cover for the 1982 Christmas Issue with an Unofficial Town Cancel for Harmony, RI. 
SEE: 1982 (Collins Cache) Christmas First Day with Harmony Cancel.

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