MUMBAI, October 6: The Union Public Service Commission has called for applications for the NDA exam, to be held in April 1998. Male candidates who were born not earlier than January 1, 1980, and not later than July 1, 1982, and have passed their 10 plus 2 exams are eligible. Guidance on the written test, syllabus, other examinations and the selection procedure will be given by Subhash Gudhate at 8, Devendra Apartments, behind Kirloskar College Rd, Nasik.Postal weekThe Department of Posts will observe October 9 to 15 as National Postal Week. A function has been organised in this context on October 9 at the conference hall, GPO building, at 5.30 pm in which Ronald Mendonca, Commissioner of Police will be the chief guest.Coin ordersThe Indian Government Mint, Fort, will commence booking orders for the sale of `50th year of Independence' commemorative coins in proof and uncirculated variety sets in denominations of Rs 50 and 50 paise. The booking will be done at the Mint counter from October 15 to December 31 between 10.30 am and 12.30 am on all working days of the mint.Mela extendedThe Yusuf Meherally Centre has extended the Gram Shree Mela which is being held in Mumbai till October 8 .