The simple sewing machine system was used to make the first prototype and the final one has been deployed at IIT-Powai post office,” Chakravarty said. “The manual stamp collection machine was suggested by secretary K Noorjehan. The trolleys are pres-ently deployed at GPO, Mumbai. After submitting reports, two prototypes were prepared and modified as per suggestions by GPO, Mumbai. The lightweight postal trolley, designed by the IDC, can be controlled by a single person.

It has ample space for advertisements and can become a revenue-generating activity, apart from lasting at least 20 years. According to IDC officials, these maintenance-proof boxes offer an easy collection of letters, change of time and common locking for all post boxes in the region.