Located on the north coast

Cancel Type	Potter No.	EKD	LKD	Cancel Notes
Straight Line Named Handstamp. Type - T1	6810.01	1.8.1770	31.5.1781	Only known used as a Ship Letter mark.
Straight Line Named Handstamp. Type - T3	6810.02	15.12.1803	xx.xx.1821	Reads: “PORT MARA / JA”.
Straight Line Named Handstamp. Type - T4a	6810.03	19.11.1823	29.1.1833	Used for both inward and outward mail and Ship Letters. Report of 1837 may be T4b.
Straight Line Named Handstamp. Type - T4b	6810.04	8.5.1833	xx.xx.1838
Circular Named Handstamp. Type - P2a	6810.05	5.3.1842	xx.8.1848
Circular Named Handstamp. Type - P3	6810.06	6.8.1843	21.10.1862
SL8	6810.07	xx.xx.1844	16.8.1848	Reads: “Port Maria / SHIP LETTER” in a rectangular box.
Numerical Obliterator. Type - A66 H	6810.08	xx.xx.1859	xx.xx.1895
Circular Named Handstamp. Type - P11	6810.09	11.5.1863	xx.12.1896
Double Ring Datestamp - with dots	6810.10	13.1.1896	3.4.1908	Known in blue 20.1.1904 to 5.2.1904.
Double Ring Datestamp	6810.11	23.10.1908	2.10.1924	Reads: “PORT MARIA” in well separated letters.
Double Ring Datestamp	6810.12	1.7.1924	25.4.1931	Reads: “PT. MARIA”.
Double Ring Datestamp	6810.13	8.3.1930	17.11.1964	Reads: “PORT MARIA” in heavy lettering.
Birmingham. Type - B1 - with *	6810.14	15.2.1949	27.11.2000
Birmingham. Type - B3	6810.15	1.9.1951	21.2.2001	Both with and without an asterisk.
Modern Single Ring (with or without *)	6810.16	11.6.1963	9.3.2001	At least two dies known. Examples have no asterisk. Foot of “P” to foot of “A” = 15 and 14 mm.
Temp. Rubber Handstamp. Type - O3PO/41j	6810.17	27.3.1995	6.9.1995	Known in blue 6.9.1995.