Twenty-five centavos
The 25c denomination was never popular in Mexico, which preferred the 20c denomination. Richard Long wrote “It is believed that this denomination was introduced since in the United States it was always a success, being that in the United States the 20-cent denomination failed; that is, in Mexico the popular denomination is 20 cents and in the United States 25 cents.” “Richard A. Long, The Availability of 20th Century Mexican Coins. In the twentieth century there were only two issues: the Scales (1950 – 1953) and the Madero (1964 and 1966).
Type 1 (Scales)
KM-443 1951 25c
These coins, authorised by a decree of 19 September 1949, had the classic Balance Scale on the reverse. Their composition was 50% copper, 30% silver, 10% nickel and 10% zinc. Weight was 3.333g. Mintage was
| Year | Mintage |
| 1950 | 77,060,000 |
| 1951 | 41,172,000 |
| 1952 | 29,264,000 |
| 1953 | 38,144,000 |
Type 2 (Madero)
On 27 December 1963 Adolfo López Mateo changed the design of the 25c and 50c coinsDiario Oficial, Tomo CCLXI, No. 49, 30 December 1963
KM-444 1964 25c
The composition of the new coins was 75% copper and 25% nickel, their diameter 23 mm and weight 5.5 g. Mintage was 20,686,000 in 1964 and 180,000 in 1966.
The 1966 coin is known with two varieties, a Closed Beak and an Open Beak.
This 25c coin was demonetized due to its confusion with the 50c Cuauhtémoc coin, which had similar dimensions, a diameter of 25 mm and a weight of 6.5 grams.