Cancel Type	Potter No.	EKD	LKD	Cancel Notes
Straight Line Named Handstamp. Type - T4b	6830.01	8.10.1833	4.2.1839
Circular Named Handstamp. Type - P2a	6830.02	1.8.1839	22.2.1861
Circular Named Handstamp. Type - P11	6830.03	11.5.1863	7.4.1897
Numerical Obliterator. Type - A67 H	6830.04	1.1.1859	31.12.1895	Dates inducate a period of use only. Dated covers known: 18.12.1866 to 2.6.1891.
Double Ring Datestamp - with dots	6830.05	29.1.1896	16.4.1915	Heavy rings.
Double Ring Datestamp - with dots	6830.06	8.7.1916	4.9.1925	A thin inner ring.
Double Ring Datestamp - no dots	6830.07	11.6.1929	17.7.1971	Rings are so close as to tend to merge.
Temp. Rubber Handstamp. Type - O3/41	6830.08	6.5.1978	23.2.1986	Usually in violet, but known in black 6.2.1978 and 7.6.1983 and in blue 25.11.1985 and 23.2.1986.
Temp. Rubber Handstamp. Type - O3*PO/37j	6830.09	8.6.1988	22.11.1991	Reads: “PORT ROYAL POST OFFICE / JAMAICA”.
Modern Single Ring - Single arc	6830.10	11.11.1992	10.1.1996
Modern Single Ring - Dual Arc	6830.11	19.9.2000	19.9.2000