SL-1	Its rarity is: B	It was used between: 6-?-27 and 6-16-41	Ink colours: Black Violet Blue-green Red Blue	Notes:
SL-2	Its rarity is: A	It was used between: 5-7-35 and 2-20-37	Ink colours: Green Blue Violet Red Black Red-violet	Notes: "CANOE" removed
SL-3	Its rarity is: AA	It was used between: 3-22-37 and 9-20-42	Ink colours: Red Blue Violet Green Black	Notes:
SL-4	Its rarity is: B	It was used between: 3-8-53 and 3-12-77	Ink colours: Green Violet Red Blue-green	Notes:
SL-5	Its rarity is: A	It was used between: 6-10-35 and 8-28-38	Ink colours: Red Green Blue Violet Red-violet Black	Notes:
SL-6	Its rarity is: A	It was used between: 4-19-28 and 9-18-37	Ink colours: Violet Red Blue Black Green	Notes:
SL-7	Its rarity is: D	It was used between: 6-17-63 and 6-17-63	Ink colours: Green	Notes:
SL-8	Its rarity is: DD	It was used between: 10-21-30 and 4-16-34	Ink colours: Violet	Notes:
SL-9	Its rarity is: B	It was used between: 3-21-68 and 3-21-68	Ink colours: Black	Notes:
SL-10	Its rarity is: D	It was used between: 1-17-62 and 3-7-80	Ink colours: Black Blue-green	Notes:
SL-11	Its rarity is: B	It was used between: 4-16-34 and 4-16-34	Ink colours: Violet	Notes:
SL-12	Its rarity is: B	It was used between: 4-16-34 and 7-9-34	Ink colours: Violet	Notes:
SL-13	Its rarity is: DD	It was used between: 9-18-77 and 9-18-77	Ink colours: Black	Notes:
SL-14	Its rarity is: B	It was used between: 10-9-82 and 10-9-82	Ink colours: Black	Notes:
SL-15	Its rarity is: C	It was used between: 6-15-77 and 6-15-77	Ink colours: Blue	Notes:
SL-16	Its rarity is: C	It was used between: 11-14-74 and 11-14-74	Ink colours: Black	Notes:
SL-17	Its rarity is: D	It was used between: 9-1-36 and 9-1-36	Ink colours: Blue	Notes:
SL-19	Its rarity is: D	It was used between: 12-16-73 and 12-16-73	Ink colours: Black	Notes:
SL-20	Its rarity is: D	It was used between: 12-16-73 and 12-16-73	Ink colours: Black	Notes: