A curious symbol, depicting 74 was commonly seen on North Indian letters in the old.
The story of the same was given by a recently deceased philatelist(he passed away after suffering with a lung disease for seven years) whose demise became public only yesterday. The person was well adored and respected over his knowledge over Indian Postage.
Akbar asked Tansen if he can light the lamps in his court by singing. Tansen said yes, but warned that if such a thing would happen, he could be brought to life only by Queen Kamla of Chittaur. Tansen sang with such force that all the lamps at the court of Emperor Akbar lit themselves, and Tansen himself burst into flames and fell down dead. The Emperor therefore attacked Chittaur and a terrible battle ensued. Seventy-four and a half maunds of sacred threads were collected from the corpses of the slain. Queen Kamla was taken prisoner, and when ordered to sing, she sang with such force that her soul burst its way through her skull and went to heaven, leaving the audience with their mouths open in astonishment. The number 74½ is still written on letters as the strongest of seals, for “the sin of the slaughter of Chittaur” is thereby incurred by all who violate the letter.’