Knox County, Maine
a service of
V. F. Thomas Co. - 167 Thorne Mountain Road - Canton, Maine 04221
(updated 11 June 2017)
Postmarks from the town of Rockland include:
1851 January 21:
Rockland post office opened. (source: Maine Philatelic Society. 1995. The Post Offices of Maine: A Rarity Guide)
1916 June 5:
The circular postmark is 22–23 mm in diameter.
Rockland post office is still in operation.