1840 April 25:
East Parsonsfield post office opened. (source: Maine Philatelic Society. 1995. The Post Offices of Maine: A Rarity Guide.)
1904 January 12:
The circular postmark is 27–28 mm in diameter.
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1934 December 18:
The circular postmark is 32–33 mm in diameter.
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1947 April 16 through 1950 May 4:
The circular postmark is 32–33 mm in diameter.
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1960 December 21 through 1961 April 7:
The circular postmark is 33–35 mm in diameter. The outside vertical height of the four horizontal bars to the right of the circle is approximately 20 mm.
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today:
East Parsonsfield post office is still in operation.
Kezar Falls
1839 December 14:
Kezar Falls post office opened. (source: Maine Philatelic Society. 1995. The Post Offices of Maine: A Rarity Guide.)
date?:
Kezar Falls post office.
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1894 January 20:
The circular postmark is 28–29 mm in diameter.
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1897 July 19:
The circular postmark is 26–27 mm in diameter.
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1900 June 11:
The circular postmark is approximately 27 mm in diameter.
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1912 December:
The circular postmark is 23–24 mm in diameter.
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1927 April 28:
The circular postmark is 29–30 mm in diameter.
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1939 December 11:
The circular postmark is approximately 30 mm in diameter.
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1953 December 25 through 1960 March 3:
The circular postmark is 20–21 mm in diameter.
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1964 January 22:
The circular postmark is 20–21 mm in diameter.
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1966 September 15:
The circular postmark is 27920–21 mm in diameter.
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1971 July 1:
The circular postmark is 20–21 mm in diameter.
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today:
Kezar Falls post office is still in operation.
North Parsonsfield
1827 December 10:
The former Blazo’s Falls post office was renamed as North Parsonsfield post office. (source: Maine Philatelic Society. 1995. The Post Offices of Maine: A Rarity Guide.)
1853 November 7:
  Manuscript postmark. (letter)
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1904 September 6:
The circular postmark is 27–28 mm in diameter.
(click on image to enlarge)
1907 October 15:
North Parsonsfield post office closed. (source: Maine Philatelic Society. 1995. The Post Offices of Maine: A Rarity Guide.)
Parsonsfield
1797:
Parsonsfield post office opened. (source: Maine Philatelic Society. 1995. The Post Offices of Maine: A Rarity Guide.)
1912 July 29:
The circular postmark is 31–32 mm in diameter.
(click on image to enlarge)
1915 July 31:
Parsonsfield post office closed. (source: Maine Philatelic Society. 1995. The Post Offices of Maine: A Rarity Guide.)
date?:
Parsonsfield post office re-opened. (source: Maine Philatelic Society. 1995. The Post Offices of Maine: A Rarity Guide.)
today:
Parsonsfield post office is still in operation.
South Parsonsfield
1830 December 27:
South Parsonsfield post office opened. (source: Maine Philatelic Society. 1995. The Post Offices of Maine: A Rarity Guide.)
year? December 12:
Manual postmark and cancellation.
(click on image to enlarge)
1897 July 19:
The circular postmark is 26–27 mm in diameter.
(click on image to enlarge)
1911 December 25:
The circular postmark is 32–34 mm in diameter. The outside vertical height of the four horizontal bars to the right of the circle is 13–14 mm.
(click on image to enlarge)
1915 July 31:
South Parsonsfield post office closed. (source: Maine Philatelic Society. 1995. The Post Offices of Maine: A Rarity Guide.)