1821:
Postmaster: Stephen Towne (source: Maine Register and State Reference Book. 1821.) [Note: In 1821 the name “Arundel” applied to what is today the towns of Arundel and Kennebunkport.]
Beachwood
1895 April 11:
Beachwood post office, a summer office, opened. (source: Maine Philatelic Society. 1995. The Post Offices of Maine: A Rarity Guide.)
date:
Beachwood post office.
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1911 August 15:
The circular postmark is 30–31 mm in diameter. (image side of card)
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1918 November 15:
Beachwood post office closed. (source: Maine Philatelic Society. 1995. The Post Offices of Maine: A Rarity Guide.)
Cape Porpoise
1866 February 3:
Cape Porpoise post office opened. (source: Maine Philatelic Society. 1995. The Post Offices of Maine: A Rarity Guide.)
date?:
Cape Porpoise post office.
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date?:
Cape Porpoise post office.
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1939 December 9:
The circular postmark is 28–29 mm in diameter.
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1965 February 26:
Cape Porpoise post office was changed to Cape Porpoise Rur. Sta. Kennebunkport. (source: Maine Philatelic Society. 1995. The Post Offices of Maine: A Rarity Guide.)
Kennebunkport
1816 December 31:
Kennebunkport post office opened. (source: Maine Philatelic Society. 1995. The Post Offices of Maine: A Rarity Guide.)
year? September 27:
The circular postmark is not clear enough to measure the diameter. (letter)
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year? November 11:
The circular postmark is approximately 29 mm in diameter.
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1848 November 16:
The circular postmark is approximately 30 mm in diameter. (notation)
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1877 July 4:
The circular postmark is 30–31 mm in diameter.
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1880 October 1:
The circular postmark is 25–26 mm in diameter.
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1884 October 2:
The circular postmark is 25–26 mm in diameter.
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1919 July 27:
The circular postmark is approximately 29 mm in diameter.
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1929 July 13:
The circular postmark is approximately 25 mm in diameter. Note that the year (toward the lower left portion of the stamp) is upside down.
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1933 May 8 through 1950 March 20:
The circular postmark is 26–27 mm in diameter.
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today:
Kennebunkport post office is still in operation.