Series and codes on the Banco Oriental de México notes
Series
The serial letters on notes were related to the sequential dates of issue, so no value had a complete sequence of letters.
| Letter(s) | Date on note | known on | |
| A | 1 March 1900 | $5 | |
| B | 15 March 1900 | $5 | |
| C | 23 May 1900 | $10 | |
| D | 11 June 1900 | $100, $500, $1,000 | |
| E | 3o June 1900 | $20, $50 | |
| F | 1 May 1901 | $5, $10, $20, $50 | |
| G | 1 June 1901 | $10, $50 | |
| 12 June 1901 | $20, $100 | $20 notes have a 2 added in ink to make 12 June 1901 | |
| H | 30 June 1901 | $5, $10, $20, $50, $100 | |
| I | $5, $10, $100, $500, $1,000 | ||
| J | 2 March 1901 | $50 | |
| K | $50 | ||
| L | 1 September 1909 | $5, $10, $20, $50, $100 | |
| M | 3 February 1910 | $5 | |
| N | $10 | ||
| O | $20 | ||
| P | 23 November 1910 | $5 | |
| Q | $5 | ||
| R | $5 | ||
| S | $5 | ||
| 3 February 1910 | $100 | ||
| T | 23 November 1910 | $5 | |
| U | $5 | ||
| V | 3 February 1010 | $100 | |
| W | 23 November 1910 | $5 | |
| X | $5 | ||
| Y | $5 | ||
| Z | $5 | ||
| AA | $10 | ||
| BB | $10 | ||
| CC | 17 June 1913 | $1,000 | |
| DD | 23 November 1910 | $10 | |
| EE | $10 | ||
| 22 April 1914 | $10 | ||
| FF | 3 January 1914 | $5 | |
| 30 January 1914 | $5 | ||
| 6 February 1914 | $5 | FF 525 | |
| 10 February | $5 | FF 525 | |
| 22 April 1914 | $5 | ||
| 24 April 1914 | $5 | ||
| GG | 12 January 1914 | $1, $2 | |
| HH | 3 January 1914 | $500, $1,000 | |
| II | $100 | ||
| JJ | $50 | ||
| 12 January 1914 | $50 | ||
| KK | 3 January 1914 | $20 | |
| LL | 12 January 1914 | $500, $1,000 | |
| MM | 30 January 1914 | $2 | |
| 2 February 1914 | $1 | ||
| 4 February 1914 | $1 | ||
| 5 February 1914 | $1, $2 | ||
| MN | 22 April 1914 | $1 | |
| NN | 10 February 1914 | $1, $2 | |
| 17 February 1914 | $1, $2 | ||
| 26 February 1914 | $1, $2 | ||
| 12 March 1914 | $1 | ||
| 23 March 1914 | $1 | ||
| 30 March 1914 | $1 | ||
| 1 April 1914 | $1 | ||
| 3 April 1914 | $1 | ||
| 4 April 1914 | $1 | ||
| 6 April 1914 | $1 | ||
| 7 April 1914 | $1 | ||
| 8 April 1914 | $1 | ||
| 13 April 1914 | $1 | ||
| 14 April 1914 | $1 | ||
| 17 April 1914 | $1 | ||
| 28 April 1914 | $1 | ||
| OO 444 | 14 February 1914 | $500 | |
| PP 4 | 10 March 1914 | $100 | |
| QQ 8 | 14 March 1914 | $50 | |
| RR | 22 April 1914 | $2 | |
| TT | 1 April 1914 | $1,000 | |
| UU | $500 | ||
| 27 WW | $100 | ||
| 15 YY | $50 | ||
| 16 ZZ | $20 | ||
| 17 AZ | $10 | ||
| 19 CX | $100 |
Codes
The notes had a code in Roman numerals. These were applied in sequence, as in the table below.
There were some anomalies. The codes used I instead of X in CIL (140) and following and in CCIL (240) and following. In the $5 sequence the numbering lost an initial C after CCLXXX (280), the next number being CLXXXI (181).
The sequence suggests there should have been a $500 CILIV (144) and $1,000 CILV (145) dated 1 September 1909, but this does not fit with the known numbers.
The codes for January to April 1914 are out of sync. Like most things, the system broke down during the Revolution.
| date on note | $1 | $2 | $5 | $10 | $20 | $50 | $100 | $500 | $1,000 |
| 1 March 1900 | I-VII | ||||||||
| 15 March 1900 | VIII-XIV | ||||||||
| 23 May 1900 | XV-XX | ||||||||
| 11 June 1900 | XXI-XXVI | XXVII-XXXII | XXXIII-XXXVIII | ||||||
| 30 June 1900 | XXXIX-XLIII | ||||||||
| 6 August 1900 | XLIV-XLVIII | ||||||||
| 1 May 1901 | XLIX-LV | LVI-LX | LXI-LXIV | LXV-LXVI | |||||
| 1 June 1901 | LXVII-LXXI | LXXII-LXXVI | LXXVII-LXXX | LXXXI-LXXXIV | |||||
| 30 June 1901 | LXXXV-LXXXVIII | LXXXIX-XC | XCI-XCIV | XCV | XCVI-XCVIII | ||||
| XCIX-CI | CII-CIV | CV | CVI | CVII | |||||
| 2 March 1903 | CVIII-CXVIII | ||||||||
| 1 September 1909 | CXIX-CXXXIV | CXXXV-CXXXIX | CIL-CILI | CILII | CILIII | ||||
| 3 February 1910 | CILVI-CILXIV | CILXV-CILXXIII | CILXXIV-CILXXXV | ||||||
| 23 November 1910 | CILXXXVI-CILXXXIX | ||||||||
| 3 February 1910 | CCXXVII-CCXXX | ||||||||
| 3 February 1910 | CCLXII | ||||||||
| CCLXIII-CCLXXX | |||||||||
| 23 November 1910 | CLXXX-CCXVIII | CCXIX-CCC | |||||||
| 17 June 1913 | CCI | ||||||||
| 3 January 1914 | CCCI | ||||||||
| 12 January 1914 | CCCII | CCCII | |||||||
| 3 January 1914 | CCCIII | CCCIII | |||||||
| CCCIV | |||||||||
| CCCV | |||||||||
| CCCVI | |||||||||
| CCCVII | |||||||||
| 30 January 1914 | CCVII | ||||||||
| 30 January to 5 February 1914 | CCCVIII | CCCVIII | |||||||
| 12 January 1914 | |||||||||
| 30 January 1914 | CCCIX | ||||||||
| 6 February 1914 | CCCX | ||||||||
| 10 February to 28 April 1914 | CCCXI | CCCXI | |||||||
| 14 February 1914 | CCCXII | CCCXII | |||||||
| 1 April 1914 | CCCXIII | CCCXIV | |||||||
| 10 March 1914 | CCCXV | ||||||||
| 1 April 1914 | CCCXV | ||||||||
| 14 March 1914 | CCCXVI | ||||||||
| 22 April 1914 | CCCXVII | ||||||||
| 24 April 1914 | CCCXVIII | ||||||||
| 22 April 1914 | CCCXX | CCCXIX | |||||||
| 1 April 1914 | CCCXXVI | ||||||||
| CCCXXIX | |||||||||
| CCCXXX | CCCXXXII |