Bimetallic: copper-nickel centre in aluminium bronze ring ((Centre: 65% copper; 10% nickel; and 25% zinc. Ring: 92% copper; 6% aluminium; and 2% nickel)
Coat of arms. With legend at top and oak and laurel wreath at bottom.
Obverse script
Latin
Obverse lettering
ESTADOS
UNIDOS MEXICANOS (Translation: UNITED MEXICAN STATES)
Reverse description
The figure of Lieutenant José Antonio de Medina Miranda. On the left side, the schooner “Iguala”, and, below, the vessel “Patrulla Oceánica de Largo Alcance”. A latent image of an anchor.
Reverse script
Latin
Reverse lettering
BICENTENARIO DE LA MARINA-ARMADA DE
MÉXICO
TTE NAV ANTONIO DE MEDINA MIRANDA
Mo
1821 $20 2021 (Translation: NAVAL LIEUTENANT ANTONIO DE MEDINA MIRANDA BICENTENNIAL OF THE MEXICAN NAVY)
Edge
Segmented reeding.
Mint
(Mo) Mexican Mint (Casa de Moneda de México), Mexico, Mexico (1535-date)