1st Printing
The first printing was imprinted on wove paper without any particular texture or watermark other than the typical grain normally assiciated with this type of paper. All of the stamps are dated with "1867" and were issued in 5 denominations: medio real, un real, dos reales, cuatro reales and un peso. (The un peso is an interesting sudden departure from the reales system to the decimal system all within the same issue of stamps. One would anticipate an ocho reales high value instead of the un peso denomination.)
The 1st printing is the only printing where a medio real stamp may be found.