Coin Specifications

Region: Mexico  
Denomination: PESO  
Diameter: 29 (mm)  

Coin Metal Composition:

Copper [75%] 6.75 (g)
Nickel [25%] 2.25 (g)
Total Mass: 9 (g)

Breadcrumb Menu:

Coin Type

1970-1983 Mexican Un Peso

Mexico 1975 1 Peso Coin Description

Mexico 1975 M Un Peso ( PESO ) - Obverse
Mexico 1975 M Un Peso ( PESO ) - Reverse

Coin Mass: 9 GRAMS    [View Coin Metal Melt Value]
Diameter: 29 (mm)
Mint Year: 1975
Mint Mark: M
Coin Name: Un Peso
Coin Rating:
Rated 0 out of 70 with 1 Verifications
Verified By:
Rating Value: 0
Obscure Finds Coin Collection (OFCC) has reviewed this item ( OFCC Coin ID:71.141 Mexico 1975 M PESO ) and has given the item a grade of UNGRADED with serial number of: | OFCC:71.141
Coin Grade:
Grade Serial:
OFCC Serial: 71.141
Face Value:
( Mexico)
Coin Notes:
If you would like to contact/report an error click HERE & use REF:T71C141

Coin Type Description:

This information is compiled/referenced data from around the web. Linked references within.
Years Minted: 1970-1983
Mint Marks: M
Denomination: PESO
Obverse Design: The linear Seal of the United Mexican States
Obverse Designer:
Reverse Design: A portrait of José María Morelos facing left
Reverse Designer:
First non-silver issue (1970-1983)

Mexico issued a 1 peso coin from 1970 to 1983 that was unlike any circulated coin of the denomination that came before it. The coin is made of cupronickel instead of silver. It weighs 9 grams and has a diameter of 29 millimeters. The linear Seal of the United Mexican States, including the words "ESTADOS UNIDOS MEXICANOS", is present on the obverse. A portrait of José María Morelos facing left is present at the right side of the reverse. The value "UN PESO" is inscribed to the left of the image, the "Mo" mint mark of the Mexican Mint is featured to the right, and the year of minting is printed below. A large quantity of these coins were struck by the Mexican Mint in several different varieties over a span of fourteen years. For 1970 and 1979, coins with narrow and wide dates were produced. Similarly, in 1975, "short wide date" and "tall narrow date" varieties were made, and in 1977, "thick" and "thin" date coins were minted. For the years 1978, 1980, 1981, and 1982, varieties exist with an open and closed "8" in the date. There are three known varieties for 1983: a "narrow date" variety, a "wide date" variety, and a proof variety.

Two cupronickel patterns of the coin were produced in 1969. One of the patterns features the value to the right of Morelos' head instead of to the left, while the other uses a slightly different portrait than the one used on the circulated coin.
Word Count: 242 -
If you would to like contact/report an error click HERE and use REF:T71
Rated 0 out of 70 with 1 Verifications

Other 1970-1983 Mexican Un Peso's

2 Example Coins Found...


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PESO 1975   M Mexico
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