1. Mahoney type 1
Williams SAF 220
Usage: March 15, 1849-June 20, 1849
Recorded on one cover from Hawaii.

2. Mahoney type 2
Williams SAF 230
Usage: June 20, 1849-August 1, 1849
black
Recorded on one cover from Hawaii. See Mail to California and via San Francisco and Panama

3. Mahoney type 3
Williams SAF 260
32.5mm (I measure it at 33mm)
Usage: August 1, 1849-July 1, 1851
black
Note there is a 5mm gap between the "S" of "San Francisco" and the "C" of "Cal." [Compare with type 6, below.]

4. Mahoney type 6-4
Williams SAF 250
33mm
Usage August 1, 1849-July 15, 1850
orange-red
Note this integral "40" rate mark has serifed letters, as in types 3 and 5, unlike type 7.

5. Mahoney type 6-5
Williams SAF 270
33mm
Usage: April 10, 1850-October 4, 1850
red
Note this integral "80" mark has serifed letters as in types 3 and 4.

6. Mahoney type 3
Williams SAF 280
34mm
Usage: May 31, 1850-August 21, 1852
black, orange-red
Note the "S" of "San Francisco" is 3mm from the "C" of "Cal." Mahoney lumps my types 3 and 6 together as his number 3. Williams fails to distinguish between strikes with or without a period after "Cal".

7. Mahoney type 7-2
Williams SAF 290
35mm
Usage: May 15, 1850-June 1, 1851
orange-red
Note the letters of type 7 are unserifed, unlike type 4. Image is from the Advertiser Sale catalogue, lot 2094, Robert A. Siegel Auction Galleries

8. Mahoney type 6
Williams SAF 310
33mm
Usage: September 30, 1850-November 5, 1851
orange-red
Note the Williams tracing places "RECd" above the date rather than below it. Image is taken from a black and white photograph in Meyer and Harris. I have not examined the cover.

9. Mahoney type 6-B
Williams unlisted
33mm
Usage: January 31, 1851-July __, 1851
red
Note there is a blank space at the bottom, but otherwise this mark is very similar to types 4 and 5.

10. Mahoney type 10
Williams SAF 410
33mm
Usage: November 1, 1851-December, 1854
orange-red

11. Mahoney type 7-1
Williams SAF 340
35mm
Usage: July 1, 1851-March 20, 1852
orange-red

12. Mahoney type 5-2
Williams SAF 350
32.5mm
Usage: July 15, 1851-August 21, 1856
black, blue
Note the letters "SCO" are tightly spaced compared to type 12 and there is no period after "CAL". The gap between the "S" of "San Francisco and the "C" of "CAL." is 5mm.

13. Mahoney type 5-1
Williams SAF 420
32mm
Usage: July 25,1853-September 19, 1857
black
Note there is a period after "CAL." and the letters "SCO" are spaced more widely than in type 11. The gap between the "S" of "San Francisco and the "C" of "CAL." is 4mm.

14. Mahoney type 4
Williams SAF 490
31.5mm
Usage: March 19, 1855-June 20, 1857
black
Note the usage period given here is from Hawaiian covers. It begins a year earlier than Williams reports and continues for a year later. Mahoney gives the usage period for this mark as November, 1849 to January, 1860, but evidence in support of that report is lacking.

15. Mahoney type 8-6
Williams SAF 470
31.5mm
Usage: August 16, 1855-January 5, 1858
black

16. Mahoney type 8-2
Williams unlisted but similar to SAF 450 (his 26PAID)
31.5mm
Usage: April 6, 1857-May 5, 1857
orange-red
Note the usage period here is from Hawaiian covers because neither Williams nor Mahoney separates this mark for a distinct usage period and its most common use was on mail from Hawaii.

17. Mahoney type 11-1
Williams unlisted but similar to SAF 500 (his 15Paid)
33mm
Usage: July 20, 1857-May 21, 1861
orange-red
Note the usage period is taken from Hawaiian covers and is longer than reported by Mahoney.

18. Mahoney type 13
Williams SAF 530
32.5mm
Usage: July 20, 1857-December __, 1861
black, red

19. Mahoney type 12-1 (with period)
Mahoney type 12-2 (without period)
Williams SAF 540 (with or without a period)
33mm
Usage: September 5, 1857-July 10, 1863
black

20. Mahoney type 15-1
Williams SAF 580
32.5mm
Usage: January 5, 1858-June 11, 1861
black
Note the year date in the image should be 1859 for reasons discussed in the Middle Treaty Period page. The usage period is taken from Hawaiian covers. Williams reports just November 16, 1850 and Mahoney gives June, 1857 to January, 1861.

21. Mahoney type 14
Williams SAF 550
Williams SAF 520
32mm
January 5, 1858-March 6, 1863
red, black
Note Williams's type 520 shows the word "Paid" more tightly spaced with a 10mm gap between the "S" of "San Francisco" and the "P" of "Paid." His type 550 has an 8mm gap. I have noted only type 550 on Hawaiian covers. Williams reports a usage period for type 520 as July 17, 1857 to April 15, 1860.

22. Mahoney type 19
Williams SAF 640
Williams SAF 670
Williams SAF 790
23.5mm
Usage: March 4, 1866-April 28, 1875
Note: these various marks (studied in some depth at Mahoney, Appendix 1) lapped over into the 1870's and are treated in more detail at San Francisco Postmarks Found on Hawaiian Mail 1867 to 1900.

23. Mahoney type 22
Williams SAF 690
22.5mm
Usage: September 11, 1868-April 15, 1871
red, black