Decimal issues of the Guanajuato mint

Copper

One centavo 

KM-391.4 1c 1880 Go (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71021)

Diameter 25 mm. 

KM-391.4 1c 1880/70 Go (Ponterio Baltimore auction, 28 March 2011, lot 8817)

Silver

Five centavos

 
KM-398.5 5c 1892 Go R (Stack’s Bowers Kirk Menczer Collection. 21 October 2025, lot 71135)

Diameter 15 mm. 1.353 g. 0.9027 silver 

In 1898 the Mexican eagle was restyled. 

KM-400.1 5c 1900 Go R (Stack’s Bowers Kirk Menczer Collection, 13 October 2025, lot 71610)

 
KM-400.1 5c 1898 Go R mule (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71137)

Ten centavos 

KM-403.5 10c 1888 Go R (Stack’s Bowers Kirk Menczer Collection. 21 October 2025, lot 71329)

Diameter 17 mm. 2.707 g. 0.9027 silver  

KM-403.5 10c 1871/8 Go S (Stack’s Bowers Kirk Menczer Collection. 21 October 2025, lot 71310)

KM-403.5 10c 1878/7 Go S (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71317)

In 1898 the Mexican eagle was again restyled.

KM-404.1 10c 1898 Go R (Stack’s Bowers Kirk Menczer Collection, 21 October 2025, lot 71336)

Diameter 15 mm. 2.707 g. 0.9027 silver

Twenty centavos

KM-405.1 20c 1898 Go R (Stack’s Bowers Kirk Menczer Collection, 22 October 2025, lot 72010)

Diameter 22 mm. 5.415 g. 0.9027 silver 

KM-405.1 20c 1900/800 Go R (Stack’s Bowers Kirk Menczer Collection, 22 October 2025, lot 72012)

Twenty-five centavos 

KM-406.5 25c 1889 Go R (Stack’s Bowers auction, 16 January 2021, lot 22293)

Diameter 25 mm. 6.768 g. 0.9027 silver  

KM-406.5 25c 1872/1 Go S (Stack’s Bowers Kirk Menczer Collection, 22 October 2025, lot 72094)


KM-406.5 25c 1885/65 Go R (Stack’s Bowers Kirk Menczer Collection, 22 October 2025, lot 72105)


KM-406.5 25c 1885/69 Go R (Stack’s Bowers Kirk Menczer Collection, 22 October 2025, lot 72106)


KM-406.5 25c 1886/66 Go R (Stack’s Bowers Kirk Menczer Collection, 22 October 2025, lot 72108)

KM-406.5 25c 1889/8 Go R (Stack’s Bowers Kirk Menczer Collection, 22 October 2025, lot 72110)

KM-406.5 25c 1890 Go/Ho R (Stack’s Bowers Kirk Menczer Collection, 22 October 2025, lot 72113)

Fifty centavos

KM-407.4 50c 1869 Go S (Stack’s Bowers Kirk Menczer Collection, 22 October 2025, lot 72242)

Diameter 30 mm.13.536 g. 0.9027 silver 

KM-407.4 50c 1884 Go B/S (Stack’s Bowers Kirk Menczer Collection. 22 October 2025, lot 72254)

KM-407.4. 50c 1886/5 Go R/S (Stack’s Bowers auction15 November 2022, lot 72763)

One peso

In 1869 the Balance Scale design was introduced. The obverse had the national coat of arms whilst the reverse design was the Balance Scale, and its three motifs – a sword, a two-pan scale, and a scroll with the word LEY – represented the executive, judicial and legislative branches of the Mexican government.

Although the public accepted the Balance Scale decimal coinage, the Balance Scale peso never took hold as a trade dollar. In 1873 the familiar and popular Liberty Cap and Rays 8 reales was restored for that purpose.

KM-408.4 $1 1873 Go S (Stack’s Bowers auction, 19 September 2025, lot 76491)

Diameter 37 mm. 27.073 g. 0.9027 silver 

In 1898 a new denomination, the Liberty Cap peso, was minted, but it was not readily accepted – the peso denomination was unfamiliar, the coin was slightly (2 mm) smaller than its predecessor, the Liberty Cap and Rays 8 reales, and the fineness was given as 902,7 rather than the familiar 10 Ds 20 Gs.

KM-409.1 $1 1899 Go RS (Stack’s Bowers auction, 24 February 2026, lot 76776)

Diameter 39 mm. 27.073 g. 0.9027 silver