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Decimal issues of the San Luis Potosí mint

Copper

One centavo

KM 390.1 reverseKM 390.1
KM-390.1 1c 1863 (Ponterio Baltimore auction, 16 November 2012, lot 11324) 

Diameter 26 mm. 8 g.

Date Recorded
Mintage		 Comment
1863 1,024,999 engraver SANABRIA

 

KM 391.8 1877KM 391.8 1877 reverse
KM-391.8 1c 1877 Pi (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71054) 

Diameter 25 mm. 8 g.

Date Recorded
Mintage		 Comment
1871    
1877    
1879    
1891   Pi/Mo (illustrated below)
1891    

 

KM 391.8 reverseKM 391.8
KM-391.8 1c 1891 Pi/Mo (Ponterio Baltimore auction, 16 November 2012, lot 11367)

Very scarce over mint mark

Silver

Five centavos 

KM 396.1 1863KM 396.1 1863
KM-396.1 5c 1863 (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71153)

Diameter 15 mm. 1.353 g. 0.9027 silver 

Date Recorded
Mintage		 Comment
1863    

 
KM 397.1 1868KM 397.1 1868 reverse
KM-397.1 5c 1868 P (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71184)

Date Recorded
Mintage		 Comment
1868    
1869/7    
1869/8   illustrated below
1869    

 

KM 397.1 1869 8KM 397.1 1869 8 reverse
KM-397.1 5c 1869/8 P (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71185)

KM 398.9 1869 reverseKM 398.9 1869 reverse
KM-398.9 5c 1869 Pi S (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71186)

Date Asssayer Recorded
Mintage		 Comment
1869 S     
1870 G 20,000 Pi/Mo (illustrated below)
1870 O  
1871 O    
1872 O    
1873      
1874 H    
1875 H    
1876 H    
1877 H    
1878 H    
1880 H    
1881 H    
1886 R    
1887/0 R    
1887 R    
1888 R    
1889/7 R    
1889 R    
1890 R    
1891/89 R/B    
1891 R    
1892/89 R    
1892/0 R    
1892 R    
1893 R    

 

KM 398.9 1870 Pi O reverseKM 398.9 1870 Pi O
KM-398.9 5c 1870 Pi O (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71188)

KM 398.9 1870 reverseKM 398.9 1870
KM-398.9 5c 1870 Pi/Mo G (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71187)

KM 398.9 1870 Pi OMo C reverseKM 398.9 1870 Pi OMo C
KM-398.9 5c 1870 Pi O/Mo C (Stack’s Bowers auction, 23 October 2019, lot 72606)

Over mintmark and assayer, with assayer "O" at San Luis Potosi over assayer "C" from Mexico City.

KM 398.9 1870 Pi G Mo CKM 398.9 1870 Pi G Mo C reverse
KM-398.9 5c 1870 Pi G/Mo C (Ponterio Baltimore auction, 6 November 2013, lot 21162)

Ten centavos 

KM 401.2 1863KM 401.2 1863
KM-401.2 10c 1863 (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71405)  

Diameter 18 mm. 2.707 g 0.9027 silver

Date Recorded
Mintage		 Comment
1863    

 

Diameter 18 mm. 2.707 g. 0.9027 silver 

Date Asssayer Recorded
Mintage		 Comment
1868/7 P 38,000  
1868 P  
1869/7 P 4,900 illustrated below

 

KM 402.1 1869 7KM 402.1 1869 7 reverse
KM-402.1 10c 1869/7 P (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71406) 

KM 403.9 1871KM 403.9 1871
KM-403.9 10c 1871 Pi O (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71408)

Diameter 17 mm. 2.707 g. 0.9027 silver 

Date Asssayer Recorded
Mintage		 Comment
1869/8 S  4,000  
1870/69 O 18,000  
1870 G  
1871 O 21,000  
1872 O 16,000  
1873 O  4,750  
1874 H    
1875 H    
1876 H    
1877 H    
1878 H    
1879 H    
1880 H    
1881 H 7,600  
1882 H 4,000  
1883 H    
1884 H    
1885 H 51,000  
1885 C  
1886 C 52,000  
1886 R  
1887 R 118,000  
1888 R 136,000  
1889 R 131,000  
1889/7 R illustrated below
1890 R 204,000  
1891/89 R 163,000 illustrated below
1891 R  
1892 R 200,000  
1892/0 R  
1893 R 48,000  

 
KM 403.9 1889 7 reverseKM 403.9 1889 7
KM-403.9 10c 1889/7 Pi R/G (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71428)

KM 403.9 1891 89 reverseKM 403.9 1891 89
KM-403.9 10c 1891/89 Pi R (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71430)

KM 403.9 1892 R GKM 403.9 1892 R G reverse
KM-403.9 10c 1892 Pi R/G (Stack’s Bowers auction, 22 October 2020, lot 72285)

Twenty-five centavos

Diameter 25 mm. 6.768 g. 0.9027 silver  

Date Asssayer Recorded
Mintage		 Comment
1869 S    
1870 G    
1870 O    
1871 O    
1872 O    
1873 O    
1874 H    
1875 H    
1876/5 H    
1876 H    
1877 H    
1878 H    
1879 H    
1879 E    
1880 H    
1881 H    
1881 E    
1882 H    
1883 H    
1884 H    
1885 H    
1886 C    
1886 R   6 / inverted 6
1887 R   Pi/Zs
1887 B   Pi/Zs
1888 R    
1888 R   Pi/Zs 
1888 R/B   illustrated below
1889 R    
1889 R   Pi/Zs 
1889 R/B    
1890 R    
1890 R/B   Pi/Zs 
1890 R/B   illustrated below

  

KM 406.8 1888 R BKM 406.8 1888 R B. reverse
KM-406.8 25c 1888 Pi R/B (Stack’s Bowers Kirk Menczer Collection, 22 October 2025, lot 72174)


KM 406.8 1890 R BKM 406.8 1890 R B reverse
KM-406.8 25c 1890 Pi R/B (Stack’s Bowers Kirk Menczer Collection, 22 October 2025, lot 72176)

Fifty centavos

KM 407.7 1870KM 407.7 1870 reverse
KM-407.7 50c 1871 Pi G (Stack’s Bowers Kirk Menczer Collection, 22 October 2025, lot 72286)

Diameter 30 mm.13.536 g. 0.9027 silver  

Date Asssayer Recorded
Mintage		 Comment
1870 G    
1870/78 O/G    
1870 O    
1871 O/G    
1872 D/G    
1872 O    
1873 H    
1873 O    
1874 H/O    
1875 H    
1876 H    
1877 H    
1878 H    
1879/7 H    
1879 H    
1880 H    
1881 H    
1882 H    
1883 H    
1884 H    
1885/3 H    
1885/0 H    
1885/4 H    
1885 H    
1885 C    
1886/1 R   illustrated below
1886 C    
1886 R    
1887 R    

 

KM 407.7 1886 1KM 407.7 1886 1 reverse
KM-407.7 50c 1886/1 Pi R (Stack’s Bowers auction, 3 June 2022, lot 72094)

One peso  

KM 408.7 1870 SKM 408.7 1870 S reverse
KM-408.7 $1 1870 Pi S (Ponterio Baltimore auction, 16 November 2012, lot 11290)

Diameter 37 mm.27.073o g. 0.9027 silver 

The balance scale peso was struck from 1869 to 1873. It was not a success in the export market, the destination for most of Mexico's silver, so the type was discontinued in 1873 in favour of the resumption of the "cap and ray" eight reales.

Date Asssayer Recorded
Mintage		 Comment
1870 S    
1870 S/A    
1870 G   illustrated below
1870 H 1,967,000 circulating counterfeit
1870 O/G  
1870 O  
1871/69 O    
1871 O    
1871 O/G    
1872 O    
1873 O    
1873 H    

 

KM 408.7 1870 GKM 408.7 1870 G reverse
KM-408.7 $1 1870 Pi G (Stack’s Bowers auction, 16 January 2018, lot 24433)

Gold

No regular-issue decimal gold coins were struck at San Luis Potosi, but there were several trial and presentation versions of gold decimal issues.