C54 Issued August 15, 1939 it's 89 years old tomorrow
If it helps any "correo aereo" means airmail.
Can I trouble you for 4 more? Does the "Cancer" and "Constitucion" overprint change what the Scott number is? A B C D
A - 327 B - C55 C - RA5 D - 331 Yes, the overprints do change the Scott numbers.