Cob Coin (Macuquina)

The macuquina (cob coin) is the silver coin that the Mexico City Mint (Casa de Moneda de Mexico) struck by hammer blow from the late 16th century until 1733. The planchet was cut by hand from the end of a silver bar, a practice that gave rise to the English term cob, meaning the end of a bar. Because of this manufacture, no two pieces are identical: irregular edges, trapezoidal or nearly triangular outlines, and weight adjusted to standard despite the crude shape. This is not a modern series with a known mintage, but colonial currency that circulated across half the world through the Nao de China, the trade route between Acapulco and the Philippines. These pieces form part of the core of the Mexican colonial era.

Identification rests on three elements. The obverse shows the crowned Habsburg shield, and the Bourbon shield once the 18th century was underway, with the ceca (mint mark) Mo on the left (the M for Mexico), the ensayador (assayer) initials, and the value on the right. The reverse displays the Jerusalem cross with quarters of castles and lions, topped with ornaments characteristic of the pieces struck at this mint. The silver runs around 930 thousandths, a fineness higher than that of many later issues. When the mint mark, the date, and the assayer are legible, the piece takes on a value well above that of an example with a worn die.

They were struck in denominations of half real, 1, 2, 4, and 8 reales. The 8 reales weighs close to 27 grams and is the central reference of this issue: the well-known Spanish Dollar, a global commercial reference coin and the origin of the dollar symbol. As metal, those 27 grams represent roughly 1,100 to 1,400 pesos depending on the silver quote, though an authentic macuquina trades well above its intrinsic content. Common and circulated examples usually range between 3,000 and 12,000 pesos, while scarce or well-preserved pieces reach tens of thousands. The grade, the legibility of the mint mark, the date, and the assayer determine the price, so it is worth examining every detail before any transaction.

The catalog entries come with real images of the documented examples, which makes it easier to compare dies and recognize the variants precisely. To review the types and understand what distinguishes an ordinary piece from one of interest, it is useful to consult the series of colonial 8 reales. If you have an inherited piece of doubtful authenticity or with a possible alteration of value, you can post it in the forum, where other collectors help interpret the legends and the striking features.

In Spain and Spanish America, the term macuquina (cob) refers to the type of coin roughly struck by hand and by hammer blows, a method widely used from the 16th century to the mid-18th century. There are various opinions about the origin of the word: while some hold that it comes from the Arabic term "machuch" ('approved' or 'sanctioned'), others claim it comes from the Quechua expression Makkaikuna —or macay cuna—, which would refer to its manufacture by hammering.