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Obverse Description
At the center, a small national coat of arms depicting the eagle in profile to the left, with stylized, leaf-like feathers and very large feet, all within an open wreath of oak and laurel. The legend ! ESTADOS UNIDOS MEXICANOS ! and UN PESO 1957 surrounds.
Reverse Description
A head of Benito Juárez García facing left with legend ! CENTENARIO DE LA CONSTITUCION DE MEXICO ! and 1857!1957.
Catalog Information
GSID:
295117
Obverse Designer:
Manuel L. Negrete
Obverse Lettering:
ESTADOS UNIDOS MEXICANOS
.UN PESO 1957.
Reverse Lettering:
CENTENARIO DE LA CONSTITUCION DE MEXICO
Mo
1857-1957
Fineness:
0.1
Weight (gr):
16 gr
Weight (oz):
0.5144 oz
Coin Rulers Name:
United Mexican States/Mexican Republic
Strike Type:
Business
Diameter:
34.5
Coin Shape:
Round
Edge:
Lettered
Variety:
Type 6, Constitution, 10% Silver
Variety 2:
KM-458
Coin Date:
1957-Mo
Denomination:
1P
Designation:
MS
Mint Location:
Mexico City
Mint Mark:
Mo
Mintage:
500,000
Coinage Type:
Estados Unidos Mexicanos
Coinage Years:
1957
Composition:
0.7 copper, 0.1 silver, 0.1 nickel, 0.1 zinc
PCGS #:
170617
Krause #:
KM-458
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To: editor@greysheet.com
Subject: I would like to contribute catalog info to CDN for 1957-Mo 1P Type 6, Constitution, 10% Silver, KM-458 MS (KM-458)
Body: Referring page: http://beta.greysheet.com/prices/item/1957-mo-1-peso-type-6-constitution-km-458-mexico-world-coins/gsid/295117 GSID: 295117 Title: 1957-Mo 1P Type 6, Constitution, 10% Silver, KM-458 MS (KM-458)
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Pricing Data Not Yet Available
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Request Pricing1910 S1P Type 1, Caballito, KM-453 MS
Worth: $75 – $4,200
1911 S1P Type 1, Caballito, Short Ray, KM-453 MS
Worth: $150 – $14,000
1911 S1P Type 2, Caballito, Long Ray, KM-453 MS
Worth: $90 – $10,000
1912 S1P Type 2, Caballito, KM-453 MS
Worth: $100 – $4,500
1913/2 S1P Type 2, Caballito, KM-453 MS
Worth: $95 – $5,000
1913 S1P Type 2, Caballito, KM-453 MS
Worth: $50 – $7,500
1914 S1P Type 2, Caballito, KM-453 MS
Worth: $900 – $16,000
1918-Mo S1P Type 2, 80% Silver, KM-454 MS
Worth: $100 – $1,800
1918/7-Mo S1P Type 2, 80% Silver, KM-454 MS
Worth: $150 – $1,500
1919-Mo S1P Type 2, 80% Silver, KM-454 MS
Worth: $95 – $750
1920-Mo S1P Type 3, 72% Silver, KM-455 MS
Worth: $50 – $600
1920/10-Mo S1P Type 3, 72% Silver, KM-455 MS
Worth: $80 – $375
1921-Mo S1P Type 3, 72% Silver, KM-455 MS
Worth: $30 – $450
1921-Mo S1P Type 3, 9 Over Inv. 9, 72% Silver, KM-455 MS
Worth: $50 – $300
1922-Mo S1P Type 3, 72% Silver, KM-455 MS
Worth: $22 – $160
Greysheet News
Weekly World Mint Coinage: August 27, 2026
8/27/2026
eBay Expands Authenticity Guarantee to Collectible Coins
eBay, one of the world's largest marketplaces for unique and historic coins, today announced the expansion of Authenticity Guarantee in the U.S. to a new category: collectible coins.
8/21/2026
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