- "N°" above the number of serie
- Number of serie with one letter and 7 digits
- Serie written in italic and in black
- Two inscriptions of type number-letter-number in any part of the front
- Title of the signer located in the middle : "Interventor Del Gobierno"
- Serie from M to Z (22/09/1937 to 17/01/1945)
- Pick #35 a/d