NGC-certified Mexican Coins Available in Stack's Bowers' Menczer Collection Sale, Including an Exceptional Rarity

An impressive assembly of rare and collectible Mexican coins certified by Numismatic Guaranty Company® (NGC®) is being offered in Stack’s Bowers Galleries’ auction of the Kirk Menczer Collection of Republican Decimal Minors. Online bidding is already underway for more than 800 coins (which are all NGC-certified) in Session 1 and Session 2, being held on October 21-22, 2025.

The top lot in the auction sessions is a Mexico 1888MO M 50 Centavos graded NGC VF 35 (Session 2, lot 72285), with an estimate of $5,000 to $8,000. This historic coin was struck at the Mexico City Mint as part of the Balance Scale series, and represents a pivotal transition year when nearly all mints produced only a handful of 50 Centavos. This was likely by government order, with the coins serving as presentation pieces or samples rather than for circulation. No more than five examples are believed to exist, with this one being the only example in the NGC Census, making this coin a crown jewel for collectors.

Kirk Menczer built an impressive collection of Republican Decimal Minors — coins that are smaller than the Peso. The auction offerings are focused on the second half of the 19th century. After Menczer passed away in February 2025, his obituary noted that he had “immersed himself in coins” and that “his unflagging willingness to share his expertise, mentor young collectors, and grow the numismatic community leaves a lasting legacy.”

Other NGC-certified highlights in this auction of Mexican coins include:

• an 1863MO 10 Centavos Silver Pattern graded NGC MS 66 (Session 1, lot 71360), with an estimate of $2,500 to $3,500
• an 1876HO F 50 Centavos graded NGC MS 65+ (Session 2, lot 72259), with an estimate of $2,500 to $3,500
• an 1889OA E 10 Centavos graded NGC MS 64+ (Session 1, lot 71402), with an estimate of $2,500 to $3,500
• an 1862MO 1 Centavo Copper Pattern graded NGC MS 62 BN (Session 1, lot 71025), with an estimate of $2,000 to $3,000
• an 1879DO B 50 Centavos graded NGC AU 53 (Session 2, lot 72234), with an estimate of $2,000 to $3,000
• an 1880CN D 50 Centavos graded NGC MS 65 (Session 2, lot 72219), with an estimate of $2,000 to $3,000
• an 1884CHA M 50 Centavos graded NGC MS 65 (Session 2, lot 72206), with an estimate of $2,000 to $3,000
• an 1886/5GO R/B 50 Centavos graded NGC MS 66 (Session 2, lot 72254), with an estimate of $2,000 to $3,000
• an 1890OA N 5 Centavos graded NGC MS 64 (Session 1, lot 71182), with an estimate of $2,000 to $3,000
• an 1868MO C 10 Centavos Silver Pattern graded NGC UNC Details (Session 1, lot 71362), with an estimate of $1,500 to $2,500

Estimates are provided by the auction house. The $ symbol indicates US Dollars.