Mexico 1738/7-Mo MF 1/2 Real
This 1738/7 ½ Real from the Mexico City mint is an example of the first design for pillar fractionals, where the obverse legend surrounds the periphery. This design was changed in 1742 to allow the crown to extend to the rim (see the 1743 ½ real). This overdate variety is considered to be rare.
Mexican numismatists hotly debate which side of the coin constitutes the obverse. Gilboy depicts the shield side as the obverse as that side bears the king's name. However, auction catalogs and dealer listings more frequently use the pillars and globes side as the obverse, as that side bears the date.
Recorded mintage: unknown.
Specification: 1.68 grams, 0.917 fine silver, 0.049 troy oz ASW.
Catalog reference: Gilboy M-05-11a, KM 65.
-  Gilboy, Frank F., The Milled Columnarios of Central and South America: Spanish American Pillar Coinage, 1732 to 1772, Regina, Saskatchewan: Prairie Wind Publishing, 1999.
- Harper, David C., ed., North American Coins & Prices: A Guide to U. S., Canadian and Mexican Coins, 17th Ed., Iola, WI: Krause Publications, 2007.